Can a Pontoon Boat Flip Over?
Ian Fortey Updated on November 15, 2022. In Pontoon Boatsby
Even though pontoon boats are some of the most stable boats on the water, it is technically possible that a pontoon boat could flip over. That said, this would be very rare and it is by no means easy to flip a pontoon boat.
What Could Flip Pontoon Boats?
Pontoon boats float on top of the water unlike many traditional boats which have a larger draft that dips down into the water. The tubes on a pontoon do have a shallow draft, but it is remarkably insignificant compared to something like a traditional fishing boat or sailing vessel. It may literally only be a matter of inches, which can allow a pontoon boat to travel over extremely shallow waters.
Because the pontoon boat rests on the water it is often at the mercy of the water. Some people have said that the captain controls a boat but the water controls a pontoon. If you are on a calm pond, you have a lot of control in your pontoon. But when the water gets rough, you immediately lose that control and that’s when having a draft becomes important.
In rough seas, a sail boat with a large keel and a deep draft is buffered on both sides by the water. The waves may build up but the shape of the hull allows the sailboat to cut through them while the water on either side of the keel actually pushes on it to support it, even as it lists and bobs. So while a sailboat may lean heavily, the keel is what allows it to maintain the balance on the water.
A pontoon boat does not have that v-shaped bull or any significant draft. When water gets rough, the pontoon boat will hit the waves hard and they will crash over the bow in much the way they’d crash on rocks. In bad enough conditions, the water will wash over the deck of the pontoon boat.
Under the boat, the hull is not able to cut smoothly through waves like a sailboat. Instead, it rides on top of them which makes for a very uneven and sometimes scary experience. When waves become unruly enough, they can lift and drop your pontoon and there’s a definite feeling like the boat could flip.
This is one of the main reasons pontoons are not meant for ocean travel. Lakes and ponds may get choppy in bad weather but rarely are they so bad that waves that can become dangerous to a pontoon’s stability become an issue.
The Secret to the Stability of Pontoon Boats
The pontoons under a well-made pontoon boat make it remarkably buoyant. In an older pontoon this was less the case for a couple of reasons.
First and foremost, the design of the tubes of a pontoon makes it very good at staying on top of the water. Each tube runs the length of the entire boat, often with a little overhang. But inside that tube are a number of chambers and each chamber is sealed. How many chambers depends on the manufacturer and how they chose to design their boat.
If a chamber were to become compromised and take on water, affecting the boat’s stability. However, because it’s chambered, the effect is very much minimized. The rest of the pontoon remains air tight. Wit triple tube pontoons, the pontoon tubes have a backup which makes them even more stable.
An older pontoon might just have that one chamber. That means if it breaks, the whole tube could flood and offset the balance of the boat. It would list to the direction of the broken pontoon and, if it’s bad enough, that side of the boat could actually dip into the water. That would greatly increase the risk of flipping if the water was rough enough and a wave or rough wake hit the boat on the side where the fully stable tube was still on the water. But even then, that’s essentially a perfect storm of bad luck. What are the odds one of your pontoons suffers a complete breakdown to the point it fully sinks and then a big enough wave hits the other side of the boat to lift and flip it? Pretty unlikely indeed.
With multiple chambers, the buoyancy of a pontoon boat is extremely stable and that makes flipping one over very difficult.
So How Could You Flip a Pontoon Boat?
As I mentioned above, a single compromised pontoon tube could potentially set the stage for a pontoon boat flipping over. Aside from that, there are some circumstances which could lend themselves to the flipping of a pontoon in other ways.
The most plausible method, however unlikely, would also involve rough seas. Pontoon boats excel at handling calm inland waters, not so much stormy weather. In rough water, a pontoon boat cannot cut through waves like traditional recreational boats with a v-shaped hull might be able to. Because the bow of a pontoon is often squared off, a wave will hit a pontoon dead on in much the same way it will crash on rocks near shore.
There is a potential for the waves hitting a pontoon to crash over the deck. This can flood the deck and be cause for alarm. But if this is combined with trying to maneuver in rough seas you may create a plowing effect. Plowing can happen in choppy water or when the pontoon is off balanced. This can be caused by too much weight at the bow or if the motor isn’t trimmed correctly which causes the bow to dip.
If the pontoon dips into a wave and the bow actually plows under the water, you could swamp the deck entirely. Again, this is a really bad mix of things that would have to occur all at the same time. If the bow is too weighted down and the engines are trimmed so that the bow is already aiming down, an ill-timed wave could act as the right push to force the bow down so far that the aft portion flips up. At this point an unlucky mix of weight distribution, speed, momentum and overall weather conditions could make the aft flip forward and over the bow such that the entire pontoon flips over.
Have I ever seen a pontoon do that before? No. But the physics of it aren’t utterly impossible.
Does That Mean You Can’t Make a Pontoon Boat Sink?
I discussed pontoon boats sinking here but the short answer is that sinking a pontoon boat is very similar to flipping one. It’s possible, but very unlikely. So even if you flipped the boat in the ways mentioned, it would likely stay afloat, it would just be upside down. Remember, as long as those pontoons have not been compromised they are virtually unsinkable. That’s just the physics of buoyancy. It’s a sealed container of air, and it would need to be forced under water and held there if the outer wall isn’t broken.
How to Avoid Flipping Your Pontoon
Even if flipping a pontoon boat is very unlikely, which it is, it’s not impossible. And there’s no sense flirting with disaster if you don’t need to. Boat safety is important and pontoon boat safety needs to be adhered to.
Watch the Weather
Staying out on the water in a storm is risky business in any boat. Sometimes it’s impossible to avoid strong winds and choppy waters and you have to literally weather the storm as well as you can. But you need to be extra cautious in a pontoon boat for the reasons listed above. Pontoons handle bad weather worse than other boats. That’s why they’re most popular on reasonably still ponds and lakes. If the waves are above 2 feet in height, you are at risk of taking on water in your pontoon and should already be heading back to safety.
Watch For Bigger Boats
You may not have considered this but one of the biggest dangers to pontoon boats is other boats. There are confirmed reports of the wake from a passing boat flipping pontoons over, so that is something you need to be wary of. While big storm waves are often easier to see coming, the wake from a regular boats engaging in water sports on calm waters may be less predictable. But if the wake hits your pontoon at the right angle it can literally just lift and toss it over.
Make sure you’re keeping your distance from any boat that has a large wake and if you can’t avoid it, try to steer into it at about a 45 degree angle. This may still cause your boat to take on water and things will be rough, but you have a greater chance of getting through it.
Learn To Maneuver in Waves
There are a few tips you can follow to lower the risk of tipping your boat. First and foremost, watch the wind and the waves. Don’t try to fight the waves like you might under normal conditions, try to go with them. Ride the waves as much as possible. When you do have to hit a wave, do like I said above and take it at an angle. Between 30 degrees and 45 degrees is often best.
Keep your speed down so that your momentum isn’t working against you. Travel at the same speed the waves are traveling at, at least as best as you can.
Keep your bow up as best you can. That may mean adjusting the trim on the motor, but you want to do what you can to prevent the bow from dipping and taking water.
Balance Your Weight
You need to keep the bow of the pontoon up, which can be done through a mix of learning how to best trim the engine but also distributing weight on the deck. One of the problems some pontoons face is that they can be easy to overload. The excess deck space makes it look like you can fit more on the boat than you actually can. Every pontoon has a specific capacity limit in terms of gear and passengers. Make sure you’re not putting too many people on board, especially at the bow as you’re moving. Overloaded pontoons will go under the water and then if a wave hits, the bow can scoop the water and potentially it will be like the front end hitting a pothole which can flip the pontoon.
The Bottom Line
Yes, it’s possible to flip a pontoon boat over, but it’s also extremely rare. If you’re boating responsibly and making sure you’re avoiding bad weather and rough water, your odds on keeping your boat afloat will be greatly improved.
Categories: Pontoon Boats