15 Best Pool Thermometers In 2022 And A Complete Buying Guide


The ideal water temperature can help make your dip into the pool or jacuzzi relaxing and comfortable. We have compiled a list of the best pool thermometers to help you keep the pool temperature the way you like, neither too hot nor too cold. Be it a hot summer day or a cool winter evening, make your bath comforting with these pool thermometers. A good bath can help de-stress and rejuvenate you at the end or beginning of your day. A pool thermometer, preferably digital, can ensure maximum satisfaction, allowing you to set the temperature as per your needs.

With various advanced features and designs, choosing the right thermometer might be challenging. So explore our list to know more.

Types Of Pool Thermometer

  • Mercury

This type of thermometer looks like a typical thermometer with a mercury line that changes depending upon the temperatures when placed in the water. The readings are placed on either side of the mercury line.

  • Digital

This type of thermometer is usually battery-powered. It has a display screen that can display the temperature by using a sensor, which is usually found in the bottom part of the thermometer. Just like a mercury thermometer, you have to place this thermometer into the water to know the temperature.

  • Infra-red

In this type of thermometer, you don’t have to place it in the water to check the temperature. You simply have to point it to the water, and it’ll display the temperature on the screen.

15 Best Pool Thermometers

1. Best Shatter-Resistant:Pull Together Floating Swimming Pool Thermometer

This thermometer resembles a flamingo on the top and the readings under it made it look like its feet. Its sensor helps display the temperature accurately, with a range between 10 degrees fahrenheit to 120 degrees fahrenheit and -10 degrees celsius to 50 degrees celsius. Because of its shape and build, the thermometer is even safe for your kids to play with. To ensure that this device stays put wherever you place it, it has a string for you to tie it for support. Whether you have a swimming pool, a hot tub, or a jacuzzi, this thermometer will allow you to set it up right every time.


  • Shatter-resistant
  • Sturdy design
  • Suitable for use as a bath toy
  • Easy to use


  • Colors may fade slightly

2. Best Wireless Sensor:Inkbird Wireless Pool Thermometer

What if we told you that you can now know the temperature of your swimming pool without going all the way and checking it? This thermometer has a wireless sensor powered by batteries that helps you know the temperature of your pool with the help of a receiver that works within the transmission frequency of 433 mhz and a range of 300 feet. It is solid, durable, and made to last long. This thermometer can display temperatures ranging from -40 degrees F to 158 degrees fahrenheit and -40 degrees celsius to 70 degrees celsius. Do you want to upgrade the way you know the temperatures? Get a wifi gateway and you can receive temperature updates online!


  • Long time intervals for temperature display available
  • Displays humidity
  • Suitable for aquariums and spas
  • Sleek look


  • Might be slightly tricky to set up

3. Best Precise Display:Blufree Pool Floating Thermometer

This thermometer is designed with a whale on top and the readings below it. Apart from being a popular bath toy, this thermometer is also compatible with bathtubs, fish ponds, jacuzzis, and aquariums. It displays a maximum temperature of 50 degrees celsius and 120 degrees fahrenheit. The thermometer floats on the water, and to prevent it from drifting away, it also comes with a string that you can tie for support. Are you looking for another design apart from a whale? Well, Blufree has got you covered, thanks to the option of choosing between a whale and a fish!


  • Warranty included
  • Precise display of temperature
  • Kid-friendly
  • Suitable for swimming pool decor


  • The string may not be long enough.

4. Best Dual Oversized Display:GAME Solar Digital Pool And Spa Thermometer

This is a digital pool thermometer that runs on solar energy. It has a solar panel on top that absorbs sunlight, converts it into energy, and uses it to power itself. Supported by a tether string so you can tie it for support, you can read the temperature in both celsius and fahrenheit by placing this thermometer 5 inches under the water. If you are looking for an off-beat water thermometer after searching for options that are either battery operated or solar powered, you can consider this option.


  • Dual oversized display
  • Compatible with any Game products
  • Easy to read screen
  • Long line design


  • Doesn’t have a light for night time

5. Best For All Seasons:Milliard Floating Pool Thermometer

This water thermometer by Milliard is made after considering the quality needs of those looking for one for their swimming pools, jacuzzis, or fish tanks. It displays a polar bear relaxing on the top of the thermometer using a life ring, giving it a stylish look and making it a suitable toy for kids while they play in the water. With an upgraded design that is 7 inches long and has a tether rope for securing it to a spot, the thermometer displays temperatures in both celsius and fahrenheit. Since the readings are clearly displayed, they are easy to read.


  • Durable
  • Suitable for all seasons
  • Safe and comfortable to use
  • Made from top quality ABS plastic


  • Accuracy may fade slightly over time

6. Best For Treasure Hunt:Intex Floating Pool Thermometer

This thermometer by Intex can read temperatures for depths ranging up to 6 feet deep. It is almost 7 inches long and can read up to 120 degrees fahrenheit and 48 degrees celsius. It stays afloat while displaying the temperature, thanks to its lightweight and sturdy structure of just 1 pound. You have the option to choose from 1 thermometer per set or 2 thermometers per set, as both are compatible with multiple water bodies like swimming pools and spas.


  • Suitable for a treasure hunt
  • Long lasting
  • Hole for grab rope included
  • Durable and accurate


  • May require assembly

7. Best Independent-Floating:eLander Pro Water Thermometers

Are you searching for a thermometer that has a simple design, is easy to use, and can also display time accurately? Your search ends here. This thermometer by eLander is very versatile as it is compatible with multiple water bodies like swimming pools, fish tanks, fish ponds, hot tubs, or spas. It can display temperatures up to 120 degrees fahrenheit and 50 degrees celsius. The device is also highly durable, thanks to the shatter-resistant materials it is made from. It has a rope connected to it for ensuring that the thermometer doesn’t float away while reading the temperature.


  • Premium quality
  • Stays intact when submerged
  • Simple design
  • Floats independently


  • The string may be slightly weak.

8. Best For Paddling Pools:XY-WQ Floating Pool Thermometer

This water thermometer is designed with a cute turtle on its top, giving it a trendy look. It does not work by simply guessing the temperature of your water, but gives you an accurate temperature reading. Made for long-lasting use, the thermometer is durable, shatterproof, and capable of measuring temperatures ranging from 20 to 120 degrees fahrenheit and -10 to 50 degrees celsius. Suitable for paddling pools, hot tubs, baby pools, and large aquariums, this one is a must-buy.


  • Visually appealing design
  • Does not accumulate algae
  • Suitable for an aquaponics system
  • Upgraded design


  • Not suitable for children

9. Best Easy-To-Grasp:SplashTechPocket Reservoir Pool Thermometer

This thermometer comes with a pocket reservoir for collecting water. This means when you pull it out of the pool, it collects the water and continues to give you the exact reading. It is 9.5 inches long and 1.5 inches wide with big, bright, and white numerals that are easy to read. It can display temperatures in both celsius and fahrenheit with a maximum limit of 120 degrees fahrenheit and 50 degrees celsius. Cold water can lead to cold shocks, whereas hot water can lead to algae accumulation. Thanks to this thermometer, you will be able to control both!


  • Easy to grasp
  • Suitable for underwater
  • Considers only water temperatures
  • 2 degree increments available


  • Paint may wear off slightly over time

10. Best Sturdy:Hofun Swimming Pool Thermometer

This thermometer from Hofun can be placed on the surface of the water and still read temperatures ranging from 30 degrees fahrenheit to 104 degree fahrenheit (0 degree celsius to 40 degree celsius). It is known for its high precision and the sturdy plastic it is constructed from, making it a premium quality product. To make it float, simply put it in the water and it will stay upright within seconds. The thermometer is suitable for swimming pools, bathtubs, spas, and ponds, regardless of whether they are indoors or outdoors.


  • Suitable for summers
  • Floats faster when submerged
  • Delivers great value
  • Blends easily into the surrounding


  • May not last long

11. Best Funny:Kingsource Pool Thermometer

The floating thermometer by Kingsource floats on the water surface for quick readings. It comes with a large number design for easy reading. The thermometer is made of durable material and is shatter-resistant. You can use this thermometer for spas, hot tubs, pools, and bathtubs. This thermometer reads Centigrade and Fahrenheit at the same time. You can use this thermometer for outdoor swimming pools, spas, indoor swimming pools, fish ponds, spring water, and Aquarius.


  • No mercury
  • Easy to use
  • Accurate temperature reading
  • Versatile


  • May be small

12. Best Solar-Powered:Meng Zhi Ao Floating Pool Mechanical Thermometer

Compared to all other water thermometers, this one has a unique design. While many underwater thermometers resemble actual thermometers, this one looks like a speedometer with readings available in both celsius and fahrenheit. It is made from superior quality ABS plastic, making it shatter-resistant and highly durable. This thermometer has its sensor located at the bottom so that it can calculate the temperature with accuracy by reading a maximum temperature of 100 degree fahrenheit and 40 degree celsius. Being almost 6 inches long and 3 inches wide, the device is versatile as it can be used in spas, swimming pools, and aquariums.


  • Clear scale
  • Stylish design
  • Solar-powered
  • Can adjust temperatures quickly


  • Might condense quickly

13. Best Environment-Friendly:YHAK Solar Wireless Pool Thermometer

Did you know that you could check the temperature of your swimming pool without going near it physically? If you’re wondering how, simply place this water thermometer in your pool and check out the readings on a display screen while you are indoors! Known to display temperatures ranging up to 60 degrees celsius and 140 degrees fahrenheit, the thermometer and sensor go hand in hand with a wireless transmission that can go up to 120 metres! Since this thermometer uses a sensor that has direct contact with the water, you are assured accurate readings.


  • Can display indoor temperature
  • High accuracy
  • LED backlight included
  • Environment-friendly


  • Might stop sending signals sometimes

14. Best Anti-Oxidant:Meanlin Measure Solar Swimming Pool Thermometer

Meanlin Measure takes pride in making different types of measuring equipment for more than 10 years. Their swimming pool thermometer reads temperatures ranging up to 70 degrees celsius and 158 degrees fahrenheit. The device measures 140*80mm, making it easy to carry around. Since the thermometer is so easy to use, you can simply turn it on, put it in the water, and wait 60 seconds to display the readings. It is made from high-quality polypropylene that will keep it from breaking or cracking. With an LCD display that is clear and precise, this is the best offbeat alternative for a swimming pool thermometer.


  • Suction cup for firm attaching
  • Corrosion-free
  • Anti-oxidant
  • Highly responsive


  • Display may fade slightly with time

15. Best Fast Synchronization:Inkbird Wireless Pool Transmitter

This water transmitter by Inkbird is a second-generation thermometer that can detect water temperature with speed and accuracy. It consists of an LCD screen that does not get misty when used and an upgraded wireless transmitter that sends data up to 300 feet. It is capable of reading temperatures as low as -40 degrees celsius and as high as 158 degrees fahrenheit in swimming pools, bathtubs, and aquariums. The transmitter is powered by 4 AAA batteries, and thanks to the wireless transmission of data, you don’t have to step outdoors to check the temperature of the water.


  • Can connect 3 thermometers simultaneously
  • Faster synchronization of temperature
  • Displays humidity
  • Silicone sealing ring


  • May require frequent replacement of batteries

Now that you know the different kinds and qualities of pool thermometers out there, you might be wondering which one to buy. To help you make the right decision, we have curated a buying guide that lists all the important points you should remember while purchasing.

How To Choose The Right Pool Thermometer

  • Temperature

The primary function of a thermometer is to display temperature. Every thermometer can display a minimum and maximum range of temperature. While choosing one, don’t forget to check this range. Temperatures are displayed either in celsius or fahrenheit. Since you have to pick a reading that is suitable for you, it is preferable to go for thermometers that can display both.

  • Design

A thermometer must be designed such that it does not become a hassle while you are in the water. To add more style, swimming pool thermometers are designed with rubber animals that make them look attractive. Whether you are planning to go for an electronic swimming pool thermometer or a normal one, go for one that has a sleek design but also works efficiently and effectively.

  • Compatibility

When you are buying a swimming pool thermometer, you have to check if it is compatible with various other water bodies. Usually, swimming pool thermometers can be used with jacuzzis, fishing ponds, and aquariums. To prevent them from drifting away, look for thermometers that have a string option so that you can tie them to a support and keep them in place.

  • Accuracy

Although people look for swimming pool thermometers that can display the temperature accurately, it is advisable to look for ones that can keep doing that in the long run. However, we can cut them some slack by considering those that can display temperatures with an upper or lower variance of around 1 degree C or 1 degree F so that you can get an overall idea of the temperature of the water body.

Why Trust MomJunction?

Wedetso Chirhah is passionate about finding and reviewing household products that help enhance the lives of his readers. With his knowledge, he compares the performance of products and compiles lists of the best ones in the market. In his article on the best pool thermometers, he explains the difference between the types of pool thermometers and gives detailed descriptions of each product along with pros and cons. He also included a detailed buying guide to help the readers have a hassle-free shopping experience.

Frequently Asked Questions

1. For how long is a new pool thermometer accurate?

This depends on the maintenance and type of thermometer that you are planning to use. Swimming pool thermometers take less time to display the temperature and can do so with a minimum difference of 1 degree. As the thermometer undergoes wear and tear, its accuracy may differ. So in the end, it entirely depends upon how well you maintain it and how efficiently it is designed.

2. How deep should the pool thermometer be for measuring?

This varies from thermometer to thermometer. While some stay afloat, some can be immersed in water. However, they can detect the temperature beyond the depth at which they are present, which can range up to a few feet. Some thermometers have a string attached to them so that you can secure and place them underwater or above to give the exact reading.

It’s quite an uncomfortable sensation when you jump into the pool only to find that it is freezing cold or hot like a jacuzzi. To avoid such unpleasant surprises before you take a dip, consider investing in the best pool thermometers. They help you determine the pool’s temperature to regulate it based on your needs. However, before choosing the ideal thermometer, ensure it displays the minimum and maximum range of temperature, is compatible with multiple water bodies, and does not accumulate algae.

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Wedetso Chirhah

Wedetso Chirhah holds a masters degree in English Literature from Mangalore University. He had written content for more than 15 B2B websites and edited school books before joining MomJunction as an editor. Wedetso ensures the articles meet the highest editorial standards. He enjoys making content understandable and relatable to readers, and he is a big fan of the versatile em... more