How Fast Can A Boat Go?

What is the maximum speed of a boat? Everybody who has anything to do with boats or the marine industry in general has this question. Ken Warby of Australia holds the Guinness 

Book of Records for the fastest boat, clocking in at 275.97 knots.

Since 1978, there have been only two official attempts to break the record. At speeds approaching 300 miles per hour (483 km/h), both boats crashed after becoming unstable.

Tragically, the drivers of both boats were killed as a result.

Boating is often thought of as a leisure sport in which to paddle a kayak, dinghy, or canoe. Most people think of boat parties or family time on a pontoon, yacht, or houseboat.

Nevertheless, boating is not something to be done slowly; rather, it’s about how fast you can navigate your boat without getting into trouble. In their eyes, the most important question is how fast can a boat go? 

People typically think of cars, bikes, airplanes, or trains when asked to imagine going fast. Boats can also go fast; the record for the fastest boat is 275.97 knots, or 510 km/h.

How Fast Can A Boat Go?

The speed of boats will vary according to a boat’s size, type, engine power ( horsepower ), and design factors.

A cargo ship (although not a boat) can travel at a maximum speed of 24 knots or 44 kilometers per hour, but the fastest ship is a passenger catamaran that holds a record of 58,2 knots. Additionally, a typical pontoon can travel at a maximum speed of 36 knots (41 mph), which is 65 km/h.

In addition, they become highly unstable and risky to operate. However, the world’s fastest pontoon boat can go up to 99 knots or 114 mph. Powered by three Mercury Pro Max 300x engines, it was a 25-foot triple pontoon.

Maximum Boat Speed For Typical Boat Types

Boat TypeThe average speed of that boatMaximum speedRecord speed
1Fishing boat or trawler9 knots or 10 mph20 knots or 23 mph 27 knots or 31 mph
2Tug boats13 knots or 15 mph19 knots or 21 mphN / A
3Deck boats30 knots or 34 mph50 knots or  57 mph70 knots or 80 mph
4Dingy or dinghies6 knots or 7 mph25 knots or 28 mph36 knots or 41 mph
5Lifeboats6 knots or 7 mph30 knots or 34 mph60 knots or 69 mph
6A sailboat7 knots or 8 mph15 knots or 17 mph68 knots or 78 mph
7Cuddy cabin boats18 knots orr 20 mph43 knots or 50 mph77 knots 88 mph
8Pontoon boats19 knots or 22 mph36 knots or 41 mph99 knots or 114 mph
9Ferry boats17 knots or 20 mph28 knots or 32 mph58 knots or 66 mph
10Houseboat4 knots or 5 mph10 knots or 12 mphN / A
11A yacht15 knots or 17 mph57 knots or 66 mph70 knots or 80 mph 
12Center console boat30 knots or 34 mph56 knots or 64 mph90 knots or 104 mph
13Ski boats16 mph or 18 mph31 knots or 36 mphN / A
14Runabout boats25 knots or 28 mph52 knots or 60 mph70 knots or 80 mph
15Game boat12 knots or 14 mph25 knots or 28 mph48 knots or 55 mph

How Do You Calculate The Average Speed Of A Boat

If you own the fastest boat, it doesn’t mean that you always need to go for the 275.97 knots record. In fact all motorboats are carefully designed with speed as one of the key parameters to meet. 

Although everyone enjoys going that bit faster than the usual boats go, it is vitally important to be safe at the same time. 

This is potentially why for the most time different boats run at their optimum speed.

This is often referred to as the average speed for that particular vessel. For example, the average speed for pontoons is 22 mph.

To calculate this, you can use Crouch’s Planning Speed formula followed by practical observation. The speed formula will give us information about the hull speed. 

The hull speed is the speed up to which waves generated by boats or ships do not restrict its movement or simply limit its speed. It is not that the vessel cannot cross the speed limit. 

However, it is the speed after boats get less and less forward movement with the power added. 

Another accurate and well-known method to calculate boat speed is by using GPS. As well as this, you can use the Dopler effect or Doppler shift and the correlation velocity log.

Using the Doppler log or correlation velocity log, the average speed of the vessel is the mean of the optimal speed ( the speed in which the vessel operates most of the time ).

As an example, even if your max cruise speed was 40 mph but for the most time, it operates between 18 to 24 mph. The average speed will be 21 mph ( 18+24 )/2=21 ).

Is 30 Knots Fast For A Boat?

When you are travelling fast in a boat cab it is great fun especially when you are with your friends or just competing. For the average adrenaline seeking baoter, it is a huge bonus as it brings both enjoyment and thrill. 

People will often attempt to take their boat to its maximum limits and will often ignore the stability or safety issues. However, some want to play it safe whilst still being able to enjoy the rush that comes with speed. 

Therefore,is it obvious to ask if 30 knots is fast for your boat? Whether it is slow, fast or in between, you should understand that it is still safe and economical for your boat type. 

For the majority of boats, especially those built for speed, they can easily surpass 30 knots under the right conditions. 

For example, deck boats, pontoon, center console boats, runabout boats have the ability to run at 30 knots for a longer period of time without any negative impact on its stability or its efficiency. 

On the contrary for boats such as a tug, dingy, trawel, sailboats and ski boats, the speed of 30 knots is too fast, unsafe and uneconomical. However, boats such as yachts or ferry’s, it is fast and safe but also uneconomical. 

Therefore it depends on whether 30 knots is fast for your boat or it’s just average speed.

However, if you are talking about average speed for different boats then yes, 30 knots is fast enough to give you that high speed thrill. 

What Happens If The Speed Is Too High?

How Fast Can A Boat Go?

If you are someone who enjoys recreational boating or have at least been on a boat in your lifetime, then you will know that a boat is somewhat unstable at rest but it will gain stability as it starts to move. 

However, do you know your boat can be unstable if the speed is too high?

Usually the stability of a boat will be calculated at rest.

This is generally affected by factors such as displacement mass, free surface, metacentric height, heel, trim and sea condition. 

However, since ships and boats constantly move their hydrostatic and hydrodynamic characteristics, there will be significant change with the centre of buoyancy, underwater volume, and pressure distribution. 

For a ship or boat, the restoring moment varies with change in speed. Initially, it will increase with the increase in speed, then the rate of change will decrease and come to a fixed point. 

From this point on, an increase in speed will have a negative impact on the restoring moment and the vessel will become more and more unstable with increasing speed. 

There will also be a change in linear and nonlinear roller damping coefficient. This too will affect the ship’s stability as the speed becomes too high.

How Fast Will A 200 HP Pontoon Go?

You may be surprised to know that pontoons are sufficiently fast to be used for most water sports. Whether it is wakeboarding, tubing or water ski, a typical pontoon boat is capable of its function. 

A typical 26 feet pontoon with 200 hp can easily reach speeds of 40 mph. Even when under full load conditions, the pontoon will still reach 30 mph. Usually, the optimum speed for water sports is between 15 and 35 mph. 

Therefore, your pontoon may be a little slow but it will be more than capable for any water sports you like to do. 

Although you could add an additional motor to upgrade to a higher power, it is the load that will restrict overall speed. In a study, it reports that for every 1000 pounds your pontoon speed is limited by 12-15%. 

If you want to upgrade your boat motor, you should follow this thumb rule. You need to double the power for the speed to increase.

For example, if you need to double your current speed, then you just need to quadruple your boat power. 

This rule is not scientifically proven but it does give a rough estimate as to what you need to do to improve your power. 

Another way to increase your pontoon speed is by adding another pontoon in between which will convert it into a tritoon. 

Frequently Asked Questions

Can A Boat Go 100 Mph?

It has been recorded that most modern day speed boats can travel at speeds of 100 mph with some speed boats even recording speeds of more than 170 mph. 

How Far Can You Travel On A Yacht?

Usually, a motorized yacht that is 35 feet in length can travel around 200 miles at a speed of 25 knots in an 8 hour day.

If you increase the speed to 35 knots, they can travel close to 300 miles in a day. If you have enough fuel and fill up enough, you can go for thousands of miles. 

Are Speed Boats Expensive?

As they are some of the fastest water vehicles on the planet, speedboats will cost a lot of money if you are looking at some of the fastest ones available. 

Final Thoughts

If you ever wondered how fast boats can really go, then this article should have provided you with sufficient information to answer that question. 

Depending on which boat you wish to purchase means that the top speeds will vary drastically.

Speed boats will be among the fastest boats available to buy and then lifeboats and houseboats will be among some of the slowest boats. 

Danny White