Swimming pool thermometer

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a tswimming pool hermometer is not a useless accessory. Its role is essential for water quality and the monitoring it offers. Knowing the water temperature is about more than just knowing if the water is suitable for swimming. It is also necessary to pay attention to water conditions to carry out specific interventions, monitoring and treatments to maintain the balance of the pool.

We selected the best models of swimming pool thermometers to help you choose.

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Why Buy a Pool Thermometer?

The pool water temperature is an important parameter to take into account. It will inform you in particular about the quality of the water. Water that is too hot can encourage the growth of algae and bacteria and affect your health.

A pool thermometer serves two functions:

  • The role of comfort, like knowing if the water is the right temperature for swimming.
  • Role in water quality and good vigilance.


This temperature measurement allows parents to avoid immersing their youngest children or babies in water that is too cold. Depending on the temperature, it also adjusts the water treatment to maintain water quality.

Whether the pool is too cold or the pool is too hot, a thermometer is used to monitor the condition of the pool water. This little accessory plays an essential role in your health and well-being.

The thermometer can be used for all swimming pools: above-ground, inflatable, tubular, in-ground pools, etc. Suitable for swimming pool and spa.


The Different Types of Pool Thermometers

There are many pool thermometers on the shelf. All models allow you to check the water temperature at any time.

analog thermometer

THE analog thermometers have mercury bands. The model is very readable. Just look at the level reached by the mercury with a measuring ruler.

digital thermometer

This type of thermometer is even easier to read. The number will appear on the screen and notify you directly. There device probe is immersed in water. These types of thermometers generally run on batteries.

You can also connect your wireless thermometer to a receiver acting as a weather station. Immerse the probe in water and the transmitter will transmit this data to your body temperature. This type of pool thermometer works like a wireless indoor thermometer.

Connected pool thermometer

I connected the thermometer directly to my smartphone. If you are away or renting a house with a swimming pool, you can measure water temperature remotely. Then take a proactive approach to pool maintenance by having participants work on water treatments.

How to Choose a Pool Thermometer?


Pool thermometers are selected carefully. This is a very useful accessory, so don't let the price guide you.

Thermometer Warranty

If you are looking to invest in a connected or wireless pool thermometer, choose one good brand. Also be sure to attach the warranty card to the product. If there is a problem, please contact the brand's customer service or contact the seller. Therefore, we will consider a refund or replacement for the defective pool thermometer.

Solar or battery powered?

To measure water temperature you need a reliable thermometer. Choosing a solar thermometer can save your battery. However, many devices such as lamps run on solar energy and do not last very long. Also check user reviews to find out how long your device will last.

For battery-powered thermometers, the part that houses the batteries must be completely waterproof. Check the reviews again to see if the thermometer absorbs water.

Ease of use

Nothing is easier to use than a mercury thermometer. It comes with a float and does not require batteries or solar power to operate. The placement is most accessible to everyone and the temperature measurement remains precise and easy to read.

The most modern will prefer the connected thermometer. But watch out for gadgets. Inappropriate temperature may affect the use of the pool.

Calibrating a digital thermometer

Calibrating the thermometer of swimming pool will give you a reference value. This allows you to study temperature fluctuations within the pool. It may be worth monitoring water conditions and taking precautionary measures.

Celsius or Fahrenheit

When purchasing, make sure the temperature is displayed in Celsius and not in Fahrenheit.

screen readability

The LCD screen of the floating digital thermometer must be easy to read and waterproof. If you're used to swimming at night, a well-lit option may be worth it. The display lights up and the water temperature is easy to read.

High quality materials

Thermometers are always immersed in water. As such, it is in permanent contact with the maintenance products used to treat the pool water. Likewise, in particularly hot weather, they are exposed to UV rays. Choose durable materials. Also, do not immerse the thermometer in the glass to avoid accidents.

What Water Temperature For Swimming?

The ideal water temperature for swimming is 26 to 28 degrees.

Water below 22° is too cold for babies.
The water temperature is starting to feel pleasant between 22 and 26°. Perfect for sport swimming.
Water between 26 and 28° suitable for those who are cold. This temperature will keep you cool on hot summer days.
Those who like hot water more than 28 degrees. You will not be able to cool down at high temperatures. Pool water is of poor quality because it encourages the growth of bacteria and algae. Then you need to intervene to monitor the pH level and check the water treatment.

For swimmers, water temperature is above all a question of taste. Some people like cold water, others can't put their toes in it if the water temperature is below 30 degrees.


Precautions To Take With A Pool Thermometer

  1. Tell your child to do not play with the thermometer, especially if it is a mercury thermometer.
  2. The thermometer should always be immersed in water. Otherwise, its existence is not interesting.
  3. Do not use bathtub thermometer to measure water temperature. Pool thermometers have a probe that goes deeper than the surface of the water.
  4. A thermometer can be fixed at the corner of the pool to prevent it from flowing into the skimmer.
  5. A thermometer ambient temperature is not suitable either.
  6. You can take the thermometer out of the water while you winterize your pool.

Need help finding
your thermometer?

Are you hesitating between several thermometers to monitor temperature?
You will have no difficulty finding high-quality measuring equipment in our catalog. If you cannot make a choice, you can of course contact our specialists: we are here to help you equip yourself with a thermometer that will not disappoint you.