15 Best Pool Thermometers In 2024 And Expert-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 by trusted brands 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 swimming sessions more comfortable 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 perfect temperature as per your needs.

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

In This Article

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-operated. 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 premium thermometer will allow you to set it up right every time.

Number of Batteries: 1 Lithium Ion batteries required | Color: Flamingo


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


  • Colors may fade slightly

protip_icon Do remember
Make it a point to invest in a shatter-resistant pool thermometer, as the glass or plastic pieces of a shattered thermometer in the pool may cause injuries.

Why We Think It's Worth Buying

Over 6,801 satisfied customers have left positive reviews about the product on Amazon.

2. Best Wireless Sensor:Inkbird Wireless Pool Thermometer

Inkbird Wireless Pool Thermometer Image: Inkbird

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. Constructed of high-quality materials, it is solid, durable, and made to last a long time. 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!

Outer Material: Plastic | Color: New Model | Product Dimensions: 4.75 x 3.75 x 10.25 inches | Weight: 12.4 Ounces.


  • Long time intervals for temperature display available
  • Features a temperature and humidity monitor
  • Suitable for aquariums and spas
  • Waterproof body
  • Sleek look


  • Might be slightly tricky to set up

Why We Think It's Worth Buying

Over 5,002 Amazon shoppers have left good reviews about this product, citing its quality features and benefits.

3. Best With ABS Case: Pentair 127 Tube Thermometer

Pentair 127 Tube Thermometer Image: Pentair

Ensure your pool or spa is at the perfect temperature with the Pentair 127 Tube thermometer. Made of high-quality materials, it delivers precise temperature readings. It features an ABS case and a three-foot cord to let you take measurements comfortably. It also displays measurements in both Celsius and Fahrenheit for your convenience.


  • Withstands bumps
  • Easy to read
  • Sinks in water to provide accurate readings
  • Durable


  • Cord may disintegrate with regular use
Pull Together Floating Swimming Pool Thermometer
Best Shatter-Resistant
Inkbird Wireless Pool Thermometer
Best Wireless Sensor
Pentair 127 Tube Thermometer
Best With ABS Case

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


This is a specialized digital pool thermometer that runs on solar energy. This energy-efficient device 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.

Outer Material: Plastic | Color: New Model | Product Dimensions: 4.75 x 3.75 x 10.25 inches | Weight: 12.4 Ounces.


  • Dual oversized display
  • Compatible with any Game products
  • Easy to read screen
  • Long line design
  • Made of high-quality materials


  • Doesn’t have a light for night time

protip_icon Did you know?
When the water temperature rises, a floating thermometer generally sinks to the bottom and floats back to the top when the temperature drops.

Why We Think It's Worth Buying

It's no wonder that this quality product has earned over 4,340 positive reviews on Amazon.

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 with a tether rope for securing it to a spot, the multi-seasonal thermometer displays temperatures in both celsius and fahrenheit. Since the readings are clearly displayed, they are easy to read.

Outer Material: Abs,Plastic | Color: White, Blue | Product Dimensions: 4 x 4 x 9 inches | Weight: 3.99 Ounces


  • 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

Intex Floating Pool Thermometer Image: Intexcorp

This thermometer by Intex can read temperatures for depths ranging up to 6 feet deep. Its key feature is that it’s almost seven 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.

Item Weight: 0.32 ounces | Number of Batteries: 1 AA batteries required | Color: White


  • 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 high-performance 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.

Item Weight: 1.58 ounces | Color: White


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


  • The string may be slightly weak.

protip_icon Pro tip
Ensure the temperature of your pool is always between 75℉ and 85℉, so your pool retains chlorine longer. This helps save on pool maintenance costs.

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 tried-and-tested one is a must-buy.

Item Weight: 2.08 ounces | Number of Batteries: 1 Lithium Ion batteries required | Color: Turtle


  • 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 that when you pull it out of the pool, it collects the pool 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 high-quality thermometer, you will be able to control both!

Outer Material: Plastic | Color: Blue | Product Dimensions: 10 x 15 x 4 inches | Weight: 2.4 Ounces


  • 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 widely tested and trusted thermometer is suitable for swimming pools, bathtubs, spas, and ponds, regardless of whether they are indoors or outdoors.

Outer Material: Plastic | Color: White | Product Dimensions: 8.6 x 4.3 x 0.5 inches | Weight: 2.4 Ounces


  • 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 high-quality, 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, making it easy to maintain a comfortable temperature. You can use this thermometer for outdoor swimming pool parties, spas, indoor swimming pools, fish ponds, spring water, and Aquarius.

Outer Material: Polyvinyl Chloride | Color: White, Yellow | Product Dimensions: 7.28 x 0.99 x 0.2 inches | Weight: 3.53 Ounces.


  • 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.

Outer Material: Acrylonitrile Butadiene Styrene | Color: White


  • 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 pool water 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 is a trusted brand that has taken 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.

Outer Material: Polypropylene | Color: White | Product Dimensions: 4.36 x 0.01 x 0.01 inches | Weight: 3.84 Ounces.


  • 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

Inkbird Wireless Pool Transmitter Image: Inkbird

This water transmitter by Inkbird is a second-generation thermometer that can detect water temperature with speed and accuracy. It consists of an LCD display 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 a great benefit of this pool thermometer is that you don’t have to step outdoors to check the temperature of the water, thanks to its wireless design.

Outer Material: Plastic | Color: White | Batteries: 2 AAA batteries required | Product Dimensions: 3.15 x 0.99 x 0.2 inches | Weight: 11.68 Ounces.


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


  • May require frequent replacement of batteries
*The prices provided in this article are based on the latest available information. However, they may vary due to changes in pricing by the seller and/or promotional offers.

How To Choose The Right Pool Thermometer?

Here’s a buying guide that lists some important points you should remember when purchasing a pool thermometer.

  1. 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.
  2. 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.
  3. 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 and for maintaining them well, look for thermometers that have a string option so that you can tie them to a support and keep them in place.
  4. 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.

Frequently Asked Questions

1. Can I use a laser thermometer in a pool?

Yes, you can use a laser thermometer in a pool. A laser thermometer is basically an infrared thermometer that will measure the water’s temperature from a distance. However, because of that, it will only measure the temperature of the upper surface of the water.

2. What happens if the thermometer breaks in the pool?

It is very dangerous if a thermometer breaks inside the pool. Broken pieces of glass and plastic floating in the water can cut your skin, or you can accidentally ingest them with the water. Therefore, you should always clean or drain the pool if a thermometer breaks inside it.

3. 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, it might not display the exact temperature. So in the end, it entirely depends upon how well you maintain it and how efficiently it is designed.

4. 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 are suitable for detecting 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.

Why Trust MomJunction?

Wedetso Chirhah, our in-house writer, editor, and reviewer, 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 their reviews to compile 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 best-selling product along with the pros and cons. He also included a detailed buying guide to help the readers have a hassle-free shopping experience.

The Bottom Line

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, and does not accumulate algae. We recommend the Pentair 127 Tube thermometer, made of high-quality materials, and the XY-WQ Floating Pool Thermometer, featuring an appealing turtle design. You can also opt for the Kingsource Pool Thermometer, as it is compatible with multiple water bodies.

Infographic: How To Regulate Swimming Pool Temperature?

Maintaining optimal comfort, safety, and enjoyment in your swimming pool requires temperature regulation. Discover effective methods, from simple hacks to efficient insulation techniques, in the infographic below to ensure a refreshing swimming experience with the desired water temperature.

Ways To Regulate The Water Temperature Of Swimming Pools (infographic)

Illustration: Momjunction Design Team

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