Bay of Fundy Tides: The Highest Tides in the World!

Twice everyday the bay fills and empties of a billion tonnes of water during each tide cycle—that’s more than the flow of all the world’s freshwater rivers combined.

This page contains a lot of information. We encourage you to read the entire page, but if you’re just looking for some specific information you may want to use the following index to jump to the appropriate section:

How High are the Fundy Tides?

Low Tide in the Bay of FundyThe Bay of Fundy has the highest tides in the world, and those enormous tides alone make that the Bay of Fundy is one of the world’s greatest natural wonders.

The height of the tide difference ranges from 3.5 meters (11ft) along the southwest shore of Nova Scotia and steadily increases as the flood waters travel up the 280 km (174 miles) of shoreline to the head of the Bay where, in the Minas Basin, the height of the tide can reach an incredible 16 meters (53ft).

The force created by these mighty waters is equal to 8000 locomotives or 25 million horses at the Minas Channel. The immense energy of the tides stir up nutrients from the ocean floor, the mud flats and salt water marshes, providing an abundance of food for the birds, whales, fish and bottom dwellers that visit or call Fundy home.

This highly productive, rich and diverse natural ecosystem has shaped the environment, the economy and the culture of the Fundy region. The effect of the world’s highest tides on the Bay’s shores has created dramatic cliffs and awesome sea stacks. The red sandstone and volcanic rock have been worn away to reveal fossils from over 300 million years ago.

What Causes the Tides?

Tides are considered the heartbeat of our planet’s oceans. They are the periodic rise and fall of the earth’s bodies of open water, and are a result of the gravitational pull of the moon and sun on the earth, as well as the perpetual spinning rotation of the earth itself.

By far the largest influence is the gravitational effect of the moon as it pulls the water toward itself, making a bulge on the surface of the ocean at the side of the moon (lunar tide).

Tidal Clock

At the same time, the centrifugal force (caused by the spinning of the Earth-Moon system) acting on the water particles at earth’s surface opposite the moon,creates a second bulge. These bulges are what we refer to as high tide.

As the moon revolves around the earth the bulges shift with it causing a shift in the water level. It’s the combination of the speed at which the earth rotates on it’s own axis (once in 24 hours), and the speed at which the moon revolves around the earth (in 27.3 days), that dictate the time it takes to go from high to low tide.

Because the moon orbits in the same direction the earth rotates around its axis, it takes a little more than a day—24 hours and 53 minutes—for the earth to fully rotate in relation to the moon (i.e. where from a fixed point on earth the moon appears in the same position in the sky as a day earlier). (Kudos to Gord Steadman for providing the proper wording)

Since the effect of the moon is the same when its straight “above” us as when its straight “underneath” us, one tide cycle (from high to high, or low to low) takes half that time: about 12 hours and 26 minutes. This in turn means that the time between a high tide and a low tide (and vice versa) is, on average, six hours and 13 minutes. This explains why tides arrive at the same location almost an hour later each day.

Neap & Spring Tides

Spring vs. Neap Tides
Spring vs. Neap Tides (click for larger version)

The Sun also exercises a gravitational attraction on the earth, which causes a secondary, less powerful, tidal effect (solar tide).

Approximately twice a month, the sun, moon and earth will more or less align to form either a full moon or a new moon. During each phase of a new moon or a full moon, the two tidal effects strengthen one another, resulting in higher high tides and lower low tides. These extremes are referred to as “spring tides”, a term derived from the springing up of the water.

Conversely, twice each month when the sun and moon are at right angles to the earth and opposing each other (first and third quarter moons), the tidal ranges are less then normal and are defined as “neap tides”.

Because of these periodic fluctuations in gravitational pulls from the sun and moon, the height of the tides varies from day to day. To really experience the world’s highest tides, you should visit the Bay of Fundy during a full moon cycle!

Why are the Bay of Fundy Tides the Highest?

The average tidal range of all oceans around the globe is 1 meter (3ft), so how can the tidal difference in the Bay of Fundy reach up to 16 meters? This tidal phenomena exists because the bay has a few distinct features: a substantial amount of water and a unique shape and size that causes resonance.

A liquid in a basin has a characteristic period of “oscillation” and, once set in motion, the liquid will rhythmically slosh back and forth in this time period. The surface rises first at one end, then at the other, while the level in the middle remains nearly constant. The speed at which it oscillates depends on the length and depth of the basin.

Tidal Map

On a small scale, picture water sloshing around in a bathtub. It takes just seconds to slosh back and forth. Due to the enormous size, the unique funnel shape, and the immense depth of the  Bay of Fundy, its natural period of oscillation is somewhere between 12 and 13 hours.

That oscillation is in perfect sync with the Atlantic ocean tide flooding into the bay every 12 hours and 26 minutes, this results in “resonance”.

Imagine someone on a swing, going back and forth, reaching the same height every time. Now imagine someone else giving the person on the swing a solid push every time the person starts to move forward again. They are obviously going to go much higher this time.

Well, the water in the Bay of Fundy is like the person on the swing and the tides coming in from the Atlantic Ocean are like the person giving the push.Its because the water in the bay moves back and forth in sync with the oceanic tides outside that there is such a large increase in the tidal range towards the head of the Bay.

The bay’s shape and bottom topography also have a secondary influence on the tides. The bay is shaped like a large natural funnel; it becomes narrower and shallower towards the upper part of the bay, forcing the water higher up onto the shores.

When is the Best Time to Experience the Tides?

There are approximately two high tides and two low tides every 24-hour period in the Bay of Fundy. The time between a high tide and a low tide is, on average, six hours and 13 minutes. As such, visitors to the Fundy coast can realistically expect to see at least one high and one low tide during daylight hours.

One of the best ways to experience the full impression of the Bay of Fundy’s tides is to visit the same coastal location at high tide, then return about six hours later at low tide (or vice versa).

Don’t worry about missing too much in the time in between. The tide does not come in like a large 16 meter high wave, but rather gently flows and gurgles across the vast expanse of exposed mud and gravel in the intertidal zone until it’s once again under the sea.

Also keep in mind that high and low tide times move ahead approximately one hour each day, and tide times vary slightly for different locations around the Bay. It’s generally a good idea to check ahead for accurate high and low tide times.

Different Types of Tides

The world’s highest tides actually provide four different tidal effects: vertical, horizontal, rapids & rip tides, and tidal bores.

  • Vertical Tidal Effect

    This is the tidal effect the Bay of Fundy is renowned for and entitles as the place with the highest tides in the world. The vertical effect can be seen at most wharves around the bay.

    First visit at high tide to see all the boats float level with the top of the docks. Then return 6 hours later to see the boats sitting on the ocean floor, up to 16 meters lower than where they started. That’s like lowering it from a 4 or 5 story building!

  • Horizontal Tidal Effect

    Several beach areas at the upper parts of the Bay of Fundy showcase the horizontal tidal effect better than anywhere else in the world.

    Again, you’ll need to visit the same area twice, six hours apart, to truly admire this remarkable sight. In just over six hours the tides can expose a vast expanse of ocean floor.

    And for this one, you will have to stop thinking in meters or feet. The water can travel up to 5 kilometres (3 miles) away from where it was at high tide. This also means you will have to be careful when you explore the exposed ocean floor because the water can rush back in at over 10 meters per minute!

  • Tidal Bore

    Tidal Bore RaftingTidal bores occur in just a few locations worldwide.

    A tidal bore is a tidal phenomenon in which the leading edge of the incoming tide forms a standing wave of water that travels upstream, against the current of a river or narrow bay.

    This wave can travel at speeds close to 15 km per hour (10 mph) and generates rapids in its wake that are between 3 and 3.5 meters (10-12 ft) high.

    In the summer months, experienced guides take visitors on a one-of-a-kind, upriver rafting adventure. Tidal bore rafting might just be the best way to experience the Bay of Fundy tides first hand!

    Click here to learn where and when to best see the Tidal Bore »

  • Tidal Rapids, Whirlpools & Rips

    Old Sow Whirlpool
    Old Sow Whirlpool

    Because the Bay of Fundy coast consists of such rugged landscape, with cliffs and large headlands sticking out into the Bay, the flow of the 100 billion tonnes of water is anything but smooth.

    Another spectacular way to see the tides is to visit a location where tidal rapids, whirlpools or rips can be seen.

    The most famous whirlpool is off course the Old Sow Whirlpool, located in the Passamaquoddy Bay towards the mouth of the Bay of Fundy. Old Sow is the largest whirlpool in the western hemisphere, and the second largest in the world!

In broad overview, the amazing Fundy tides can be considered one of the world’s most natural and unspoiled wonders.

At Hopewell Rocks the tidal currents have carved and sculpted towering statues of red sandstone. Topped by evergreens, they resemble huge flowerpots and stand as one of many Fundy marvels.

At St. Martin’s, the endless tidal action has carved out spelunker perfect sea caves. And with each receding tide, vast nutrient-rich mudflats are exposed in the Minas Basin.

And underlining the fragility of nature is the certainty that with the continuous passage of time, the surging, monumental tides will ultimately destroy themselves as they slowly erode and disintegrate this unique basin.

So don’t wait any longer and plan your trip to the Bay of Fundy today!

72 comments received

Click here to leave your own comment below ›

    Robert Dunn

    1. Is it safe to kayak in the bay of fundy
    2. Where can one put in to best kayak the bay of fundy and see the cool rocks?
    3. Is it safe to kayak in the Gulf of St. Lawrence? It appears to be about a 2 hour drive from
    the top of Fundy.
    4. Are there camp-sites up there?
    5. When is the best month of year to kayak up there?

    Please write back. If it looks good I plan to visit there this summer.

    Jill

    Hi – We are in Nova Scotia now. Trying to find the best place to visit the tidal bore – are there any restaurants we can sit and watch this phenomenon?

    Annie

    Hi Mike. Thanks for your well presented info.
    I am a Caper living away now :( & recently learned of blue beach.
    My 8y.o. Dtr & sister & I combed the beach for hours
    Enjoying the beauty of The bay.
    Thanks for explaining the tidal phenomenon!

    ED

    Mike… many years ago my parents took me to see the Bay of Fundy. BUT I don’t remember the location… We stood on a sidewalk and there was a steel railing. We watched the tide come into the bay. There was a wave about 3 feet high.. Also in the general area there was an area that had caves that you can walk around at low tide. A horn was blown and everyone had to leave the caves because it was getting close to the tide coming in. Do you have any idea where this was? I want to bring my family to the same place….

      Mike Postma

      My guess would be the Sea Caves near St. Martins, New Brunswick

    Susan Corbin

    Another question, Mike, we are having our bank give us Canadian money. We can take cash or they can put the money in an account and give us a cash card that draws the Canadian money to used via card rather than cash. Will we be charged for using a Canadian money card the same as our American Express? Where is the best place to stay for a couple of days on in West NS? From my research it will pretty cool in August. What say ye to that?

      Mike Postma

      Hi Susan, this comment slipped through the cracks. This answer is probably a bit late for you, but it might be useful for someone else in the future. Your bank would be better able to answer your question about any fees associated with their different products, but there shouldn’t be any hidden fees as far as using a cash card in Canada. Where to stay depends on what you’d like to do and see. Personally, I’d drive along the coast and stay in different places. As for the temperatures, both August and September are very comfortable months. If you stay close to the Bay you can expect temperatures of around 20 to 25 degrees Celcius (68 – 77F).

    Susan Corbin

    Mike, how wonderful to have come upon this website. We are going to NS on vacation August 21-31. There of four us retired folks who want to experience the beauty of NS. We have rented a van for our travels, and plan to visit the areas about which you write. I do want to walk on the ocean floor and see the tides come and go. We will probably stay on the West coast for a couple of days. I am even more excited having read your posts. Thank you.

      Mike Postma

      That’s great to hear Susan. Thanks for leaving a comment. I am glad you found these posts to be inspiring and I am sure you will enjoy your trip!

    Wren

    Suppose you wanted to see one the highest tides on the Bay of Fundy.

    Choose two good opportunities.

    Around noon or midnight on the day of a full Moon.

    At sunrise or sunset on the day of a new Moon.

    Around noon on day of a new Moon.

    At sunrise or sunset on the day of a full Moon.

    Martin- a viking from Denmark

    Hi
    I was studying tides, because this year I will do a sailing around Scotland- British Island.
    Then I landed on this site.
    The presentation of tides is excellent.
    But I was also caught of learning about Bay of Fundy, which is brand new knowledge for me. Very interesting and stimulating for my travel instincts.
    Would be fantastic to see this in real.
    How do I travel from Europe to your fantastic place? What’s the nearest airport?
    Best greetings to all og you over there.
    Martin.

      Mike Postma

      Hi Martin, the closest, cheapest, and easiest to reach airport would be Halifax, Nova Scotia. From there you can reach most Bay of Fundy locations within a 1-6 hour drive. Keep in mind that it’s a very large area and viewing tides will take up a good chunk of time. The Bay of Fundy is on the west side of Nova Scotia, but the north and east side of Nova Scotia are also very nice places to go sailing.

    Ali

    what happens to the marine organisms during low tide?

      Mike Postma

      Some come and go with the tide, others remain on the wet soil and in the small puddles. This is why you’ll often see flocks of birds feeding on the ocean floor during low tide.

    Junaid Ahmed

    thank you :)

    Mary Chisholm

    Hi Mike:
    My husband and I moved to West Dalhousie, north of Bridgetown about a year and a half ago..love it here!
    Perhaps you can direct me to some info about the relationship between the whale migrations and the tides, please? I am particularly interested in the lunar/magnetic influences that may also be guiding the whales to this area. It just feels very magical and sacred in this area, in fact we believe we were guided to this location. I know you are a scientist, but sometimes other elements cry out for acknowledgement. Thank you for your kindness and sharing your obvious love for the Bay of Fundy’s magic. Mary

      Mike Postma

      Hi Mary, thank you for your very thoughtful comment. Nova Scotia’s Annapolis Valley is definitely a great place, so I am not surprised to hear you love it there. I am afraid I am not really a scientist (a degree in Computer Science is as close I come) and I am not sure if and how lunar/magnetic influences might be guiding the whales.

      It is my understanding they mainly come to the Bay of Fundy because the large tides result in and enormous amount of krill, herring, and other food sources. The Bay is a large sheltered area which makes it a perfect location for whales to give birth, feed and raise their young.

      You may want to pose the same question to the folks at either the Grand Manan Whale Research Station (http://www.gmwsrs.info), the Canadian Whale Institute (http://www.canadianwhales.org), or the New England Aquarium (http://www.neaq.org). And if you hear any interesting information, I’d love to hear about it.

    jenni

    Hi, i’m thinking of visiting Joggins. How does the tides (before and after) compare between Joggins and Hopewell rocks in terms of effect/scenary? I have heard from other travellers that going to Joggins for the Tides (before and after) are not worth it as you can’t really tell the difference…is that true?

    thanks
    Jenni

      Mike Postma

      I would agree with them. Although the effects of the tides can be clearly seen at Joggings (and there certainly is a clear difference between high and low tide), the vertical effect of the tides is much more pronounced at the Hopewell Rocks (and thus more interesting). Also, keep in mind that the tidal range is highest near the head of the Bay, with the highest tides occurring in the Minas Basin (which is part of the Bay of Fundy). Most wharves along the Fundy coast are great locations for viewing extreme vertical tides. In Nova Scotia I’d suggest Halls Harbour, Parrsboro, and Advocate and in New Brunswick I’d suggest Alma and St. Martins. Of course there are tons of other great places too.

    Olga

    Dear Mike, if my origin is Toronto what will be my destination? I mean where i should fly from Toronto to enjoy the Bay of Fundy? Thanks, Olga

      Mike Postma

      Hi Olga, you have a few options. You could either fly to Saint John (or Moncton) in New Brunswick or to Halifax in Nova Scotia. In either case, you’d probably want to rent a car and drive yourself around from there. I am assuming you want to see the tides and possibly walk around on the ocean floor when the tide is out? On the Nova Scotia side, two popular spots are Blomidon Park and Halls Harbour. Another nice spot closer to New Brunswick is Joggins Fossil Cliffs. And, if you’re into running, you should check out the “Not Since Moses” race that is held each summer. It’s a unique opportunity to run (or walk) either 5 or 10km across the ocean floor and it’s a lot of fun. On the New Brunswick side, Hopewell Rocks is definitely the goto place.

    Sachin

    Dear Mike,

    What are the horizontal tide generating forces.

      Mike Postma

      Hi Sachin, it’s a combination of the gravitational pull of the moon and sun on the earth, as well as the perpetual spinning rotation of the earth itself. Please read the “What Causes the Tides?” section on this page for a more detailed explanation.

    Corey

    Hey mike, awesome informative writing! Off topic, are you related to Paul Postma, currently playing for the winnipeg jets?

      Mike Postma

      Thanks Corey. As far as I know Paul and I aren’t related. Although I might tell people differently if he’s ever in the highlight reel :)

    sam flores

    thanks for the awsome info.I really needed it

    Erin

    Hi! have a project for school. Know any other reliable web sites for info?

      Mike Postma

      What kind of information are you looking for specifically?

    Andy

    I am wondering what the velocity of current on average is at the Bay of Fundy? I understand that some areas of the Bay may have higher velocities but I’m wondering about the average velocity and how that exactly relates to Pan Ice formation and flow. Thanks for any info

      Mike Postma

      I honestly couldn’t tell you what the average current is. I know the speed of the current varies greatly depending on where in the Bay of Fundy you are and that water flows up to 10 metres per second in certain areas. Fisheries and Oceans Canada might have that kind of information though: http://www.waterlevels.gc.ca

    Andrea

    thanks for the information! it really helped me out with my research report on the bay of fundy. amazing website. :) x

      Mike Postma

      You’re welcome and thanks for the kind words. I hope you do well with your report!

    Penny

    What happens in the winter? Does it ice up or do the tides still change like that?

      Mike Postma

      Although the water is very cold (year round), the Bay of Fundy doesn’t get covered in ice. The water simply moves too much for that to happen. So you can view the tides change year round.

    jeff wheelock

    I think this a very informative website. I have a question. The tides in the Digby area this month (January,2013)are exceptionally high, right now its only quarter moon & they are higher then a lot of people remember.Wondering why?

      Mike Postma

      Hi Jeff,

      I wasn’t aware of the tides being any higher now than they would have been historically. However, I don’t live in Digby so I can’t see them for myself on a daily basis. But we could check the recent water levels as predicted by Fisheries and Oceans Canada and see if they are off with some of the historical predictions (http://www.waterlevels.gc.ca/eng/data).

      Since January 14 was 3 days after the first new moon of the year we’ll look at similar dates in previous years as well:

      - Jan 14, 2013: max tidal difference was 8.4 meters and the max height was 8.7 meters.
      - Jan 26, 2012: max tidal difference was 7.9 meters and the max height was 8.1 meters.
      - Jan 07, 2011: max tidal difference was 6.8 meters and the max height was 7.9 meters.

      Unfortunately I couldn’t find data that goes back any further than that. But even with such a small set of data, there definitely seems to be a pattern there of increasing tides. Then again, this probably isn’t the most scientific way to go about comparing them either. Remember, these are predicted tides and according to the website this data comes from: “Meteorological conditions can cause differences (time and height) between the predicted and the observed tides. These differences are mainly the result of atmospheric pressure changes, strong prolonged winds or variations of freshwater discharge.”

      That being said, you might be on to something here. I would encourage you to check other similar dates (e.g. full moons in July throughout the years). If you find a similar pattern, I’d love to hear about it. You may also consider putting in a call to Fisheries and Oceans Canada. They would know for sure what’s going on.

      This is very interesting stuff, so please let me know what you find out.

      Mike

    Al Lindsey

    Do the high and low tides in Fundy go above and below average sea level or more one way or the other?

      Al Lindsey

      I,m interasted in relative elevation.

        Mike Postma

        The average sea level is measured as the halfway point between the mean high tide and the mean low tide. So the short answer to your question is the tides go equally above and below the average sea level. That being said, I have a feeling you might be asking how it compares to the average height of the global water surface, but that’s a tricky question because the average sea level is not constant over the surface of the Earth. For more details (and probably a better explanation) see http://en.wikipedia.org/wiki/Sea_level

    Steve Bird

    Thanks for the info, Mike.

    How in the heck do you tie up a boat to a dock, when the water might drop 16 meters by the time you get back to it?

      Mike Postma

      I’ve seen a number of floating docks around the Bay of Fundy and that’s definitely the easiest solution. You can tie the boat like you would normally and it will move up and down together with the dock. A similar, but less expensive idea, are sliding tracks on the pilings. You can tie the boat to the “slide cars” on these tracks and they will move up and down with your boat. In all other cases you’ll have to use spring lines. It gets a little complicated, but here’s a good explanation: http://www.tropicalboating.com/boat-handling/spring-lines.html

        Tom Ray

        Thanks for the compliment on my explanation of using spring lines on a dock with tidal changes, Mike! The same principles that we use down here in Florida will work in a place like the Bay of Fundy, but with much longer spring lines.

        Mike Postma

        Tom, the compliment is well deserved. Your explanation is detailed yet very easy to follow and the illustrations are also extremely helpful.

    Maura Weston-Lee

    Dear Mike,
    Thank-you for the wonderful website. However, I was wondering how long it took for the tide to come in over the mudflats and wharves, and if their respective locations made a difference in the time.
    Also, what is the time difference between vertical and horizontal tides?

    Thank-you! Maura

      Mike Postma

      Hi Maura, the time between a high tide and a low tide (and vice versa) is, on average, six hours and 13 minutes. As you already alluded to in your question, the exact time at which it is high (and low) tide depends on the location.

      For instance today, the next high tide in St. Andrews (which is near the mouth of the Bay) will be at 6:06PM, whereas that same high tide in Burntcoat Head (which is much more near the top of the Bay) will be reached at 6:44PM.

      There is however no time difference between vertical and horizontal tides. They are actually the same tide and those terms just refer to how we observe the tidal difference.

      We most often think of the tide as a vertical tide (i.e. the vertical distance of the water level between high tide to low tide). The Bay of Fundy’s highest tides also refer to the vertical tide difference. The best way to see vertical tides is to visit small harbours around the Bay. Halls Harbour, Parrsboro, and Advocate are great locations in Nova Scotia. Alma, Hopewell Cape and St. Martins are great in New Brunswick.

      Another way to see the tide is by observing the horizontal change of the water level. There are parts of the Bay of Fundy where the tide will move back and forth (so horizontally) for up to five kilometres (~ three miles). This results in large areas of the “ocean” floor being exposed during low tide. There are many parks and beaches along the Bay of Fundy that provide you with access to walk on the ocean floor. One of my personal favourites is Blomidon Park in Nova Scotia. This also happens to be relatively close to Halls Harbour, so you could combine the two to see both horizontal and vertical tides.

    Alan Rodney (in Paris)

    These tidal machines are “enormous” potential energy sources. Have there been (or are there now) plans to harness even a fraction, either through rise and fall mechanisms or turbine generators anchored in the bay? I have been arguing recently that wind is fluky at best, and not dense whereas water is relatively dense and tides are totally predictable.
    I’d really appreciate some feed-back
    “Alan in Paris”
    Former Director 2000-2006
    National Academy of Rechnologies of France

      Mike Postma

      Hi Alan, they are trying to.. but the Bay of Fundy is a pretty extreme environment so the first couple of attempts weren’t successful. I am not entirely sure where the whole process is currently at, but please take a look at the last question & answer on this page: http://bayoffundy.com/frequently-asked-questions/

        Lodewyk Botha

        We, Water Wall Turbine Inc., have developed and Patented a Turbine, with a 180 degrees different approach to Energy harvesting from currents. 99% of current devices extract Kinetic energy (MCT’s like wind generators).

        Our system is based on the principle of converting the KE into Potential Energy and then to extract that Energy.

        The advantage is a much slower rotating Turbine (around 20 rpm)that rotates with the current with almost no relative speed difference between the blades and the water, making it absolute Eco- and Bio-friendly, and it can be very robust.

        This WWT (Water Wall Turbine)can be deployed in very fast flowing currents, that has much higher Energy in it. Energy is related to the Power 3 of the speed. So, Energy in a 2m/s current=Constant x 2^3=C x 8 Watt, whereas Energy in a 5m/s current =C x 5^3 =C x 125 Watt.

        We have started with the first project (Unit) in Vancouver,that will have a max predicted output of around 1 MW.

        This technology will be ideal for the shallow, fast flowing currents in the Bay.

    Bill Rov

    Dear Mike,
    Thanks for such a wonderful information. Tides are one of the strongest force on the Earth and is the most effective source of green energy. Are there some serious organizations involved in creating of Power Units for generating electrical energy from tides in your erea ?
    It looks like you can supply plenty of electricity all over the Eastern parts of Canada and USA without demaging an environment. Am I right or not ?
    Please reply.
    Thanks.
    Bill

    Dr. Dan Woodman

    Very interesting. I grew up in Maine and went to the U of M in Orono. I am retired from the Navy, but I continue to teach HS and college classes. I have visited the area a couple of times, but always was disappointed in the “Old Sow Whirlpool”. It was never like the photo. Any ideas why I missed it?? Your photo of Old Sow is grear as are the others.

    Is it true boats have been taken under by “Old Sow”.

    I will show all these photos to my 7th grade class since we are covering Astronomy – Earth – Moon and Sun now.

    Thanks,

    Dan Woodman

      Mike Postma

      Hi Dan,

      You have to get pretty lucky to see Old Sow form one large funnel. Although that does happen from time to time, more often Old Sow just takes the form of a collection of small gyres, troughs, spouts and holes. I have more information about that here: http://bayoffundy.com/about/old-sow-whirlpool/

      Your best chance at seeing a funnel would be 3 hours before high tide, during spring tides (so during a full or new moon) and in combination with high winds. In such a situation boats can most certainly be taken under. I have two additional reading links at the bottom of the above page that are certainly worth checking out.

      Mike

    Mike

    Great information Mike. I attended ‘boot camp’ at CFB Cornwallis in late summer through end October 1985 so I got to see first hand this incredible Natural Wonder. I have been living in the United States the last 20 years and do not know if I might ever again get an opportunity to revisit the Bay of Fundy, but even if I do not I am pleased to see your Spring Tide Timelapse video. Thanks.

    Kori McMillian

    Thank you for such great information. I am comparing the Bay of Fundy with the Chesapeake bay for my Oceanography class.

    I am hoping to visit the Bay of Fundy in the future because of the fascinating information your site provided.

    Thanks again.

    sylvia

    thanks alot, I have a project due in four days about tides and when I got on this website, it helped me out ALOT :)

      Mike Postma

      You’re very welcome. It’s always good to hear that this information helped someone out.

    Terry Arnold

    Brilliant article and explanation.
    Thank you.

    Mike McDuffie

    Excellent article explaining the tides and natural wounders arround the Bay of Fundy. Will be putting this on my “places to vacation” list.

    Gord Steadman

    Great article about the Bay of Fundy tides! I always wondered why the tides there were higher than everywhere else. I thought they would be the same everywhere. That’s the first time I’ve seen it explained in such easy terms.

    However, the wording in the article could be changed where it states the moon fully ‘rotates’ around the earth in 24 hours 50 minutes. The moom ‘orbits’, or ‘revolves’ around the earth in 27.3 days, also called a lunar month. The moom ‘rotates’ on its own axis once in a lunar month. The earth ‘rotates’ on it’s own axis once in 24 hours. Since the moon is ‘orbiting’ the earth in the same direction as the earth’s ‘rotation’, it takes approximately an extra 53 minutes for the earth to fully ‘rotate’ in relation to the moon. ie; where from a fixed point on earth the moon appears in the same position in the sky as a day earlier.

    (24/27.3) x 60 mins per hr = approx 53 minutes

      Mike Postma

      Thank you very much for your compliment and especially for your additional input. You’re absolutely right and I’ve changed that section of the article to reflect this. Thanks again!

    josh

    Thx for the artical, you really helped me with my research!

      Mike Postma

      That’s great to hear Josh. I am glad we could help you out.

      Kelsie

      Thank you for putting this on the web site, you really helped me with my reserch. thanks agian.

    'Charlie' Gravett

    Thank you for the detailed information on the Bay of Fundy tides. Here on the Island of Jersey one hundred miles south of the southern coast of Great Britain and seventeen miles west of the French coast we experience the 3rd or 4th highest rise and fall in world tides, dependant on which text book you refer to. I have used some of your information to explain to young and new members of our Long Distance Swimming Club how tides work and how they are affected by the sun, moon and atmospheric pressure.

      Mike Postma

      Hi Charlie, it’s great to hear that this info was useful to you and your club members. I’d never heard of the Island of Jersey before, but I just looked it up and it looks fantastic!

    Carrie Curnutt

    Thanks for the wealth of information Bay of Fundy! I am a 6th grade Earth Science teacher and your page has informed my students and the math class. I really appreciate the fact that you are letting me use your spring and neap tides diagram. Not only that, but the fact that you enlarged and tweeted it for us to use in our notes and my school fusion page. THANKS!!!! I have encouraged my students to travel and see it in person and so will I as soon as I get a chance. THANKS AGAIN!!!

      Mike Postma

      You’re very welcome Carrie!

    Naomi

    wat up

      Dan

      The Bay of Fundy tides :)

    James

    When I was 16 I helped my father fish salmon [ net fishing] in the Bay of Fundy. These salmon averaged 12 lbs and we had a catch as high as 90. A storm could come up quite suddenly, and the waves would appear to be about 30 ft high. In times like these we were glad to reach shore safely.

      Mike Postma

      Thanks for your first comment, James! That’s a side of the Bay of Fundy most of us (luckily) never get to experience. I am sure you have some amazing stories though and we’d love for you to share those with everyone. Let me know if you’d be up for that and I’ll contact you via email. I hope to hear from you again. Cheers!

    Daryll McIntyre

    Wow, this is by far the most comprehensive overview of the Bay of Fundy tides I’ve found online. Thanks guys!

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