If you wish to track how fast you are moving across the water, a speedometer is necessary to have. Whether it’s just curiosity or you need to stay under the speed limit, the best boat speedometers will give you real-time accurate readings.

When choosing a speedometer for your boat, you need to decide whether you want a manual or a GPS model and if you want some additional functions on the device. In our boat speedometer reviews, we’ll do an in-depth analysis of all the top models available right now, so you’ll have an easier time deciding which one will fit best on your boat.

How To Choose The Best Boat Speedometer – Buying Guide


Manual Speedometer (Pitometer)

While not as popular as they once were, manual speedometers are still able to give you an accurate reading. They work by measuring the air pressure acting against it through a pitot tube, which picks up the water as the boat is moving.

This is not always completely accurate, as a loose tube or a clog in the system can alter the reading. However, manual boat speedometers are still a good option, and some people prefer their classic design.

These speedometers tell you your speed through the water, which if you are boating in a location with a lot of currents, it will be handy to know. A current can push you or carry you along, and this speedometer will tell you what the boat is doing in the water it’s floating in rather than the speed relative to the seafloor below.

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GPS Speedometer

A GPS speedometer works on an entirely different principle – it receives the signals emitted by GPS satellites in the orbit and uses the data to calculate how fast you are moving overground. It refreshes very quickly and always gives you an accurate reading.

This type of speedometer will usually have a digital display that can also show other pieces of information (besides speed), for example, distance covered or estimated time to your destination. Furthermore, GPS speedometers can also switch between units (mph, kph, or knots).



Q: GPS or Manual Boat Speedometers?


We would say GPS, but it depends on your preference. If you have a pre cut hole for the instrument, a manual speedometer might be a better fit. They are also usually more affordable. On the other hand, digital GPS readers are more precise, easier to install and give you other information too.

Q: What Is A Boat Speedometer?


A boat speedometer is a device used to track and display your speed on the water. It works by either tracking your movement using GPS signals or by measuring the changes in air pressure. Modern speedometers are very precise and give accurate readings.

Q: Why Do I Need A Boat Speedometer?


Knowing your speed is very useful for several reasons. With this info, you can adjust how you’re using the engine and how much fuel you’re consuming. You can also calculate how much time you’ll need to reach your destination. Finally, some waters have a speed limit, so this will allow you to stay under it.

Q: Are GPS Speedometers Any Good?


Yes, GPS speedometers are very good. They are very accurate, easy to install, and often display a lot more information than traditional manual models. On the flip side, digital speedometer kits can also be somewhat expensive, but the investment is worth it.

Q: Are Boat Speedometers Accurate?


Yes, they are very accurate. Models that use GPS refresh almost constantly so you’ll always have precise readings. Even manual models can give impressive accuracy, especially in calm water conditions.

Q: How Do You Test A Boat Speedometer?


If you doubt that your manual water speedometer isn’t working properly, you can simply blow into the tube and see if the needle moves. If not, the tube is probably clogged or leaky, and you might need to clean or replace it.

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A speedometer has become one of the standard gauges on a boat. Whether you’re installing a new unit or replacing the broken old gauge, it should be easy to use and accurate in different weather conditions.

Modern digital speed gauges can give you accurate speed reading along with loads of other information. We hope that our reviews and guides have helped you narrow down your choice, so you always have accurate speed information while exploring the water.

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