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Ideal Hot Tub Temperature – 21 Most Frequent Question Answered [2023 Edition]

ideal hot tub temperature

The hot tub is an excellent place to relax and unwind. That’s why it makes sense to install one at home. Then you can enjoy the benefits of spa-like relaxation any time you please. If you love being in water as much as we do, then you might be considering investing in one of these fantastic devices, too. But what is the ideal hot tub temperature?

Why hot tub temperature matters

The hot tub temperature is very important because it has a direct effect on your health. For example, you might burn yourself if the water is too hot. In some cases, this could even lead to a skin infection. If the water is too cold, on the other hand, you might not enjoy your experience in the hot tub as much. You might not even be able to stay in for an extended period of time. This is why it’s important to choose the right temperature.

Other benefits of the appropriate hot tub temperature include:

  • It looks and smells better
  • It lasts longer, which means you won’t have to replace it as often
  • You’re less likely to get an infection if the water is at the right temperature
  • It’s better for the environment

TLDR – What should the hot tub temperature be?

Most hot tub owners think that 100–102F (35–38°C) is the perfect temperature. Your ideal temperature may be slightly higher or lower depending on your personal preferences and local weather. For health reasons, hot tubs should not exceed 104°F (40°C).

How long does it usually take a hot tub to warm up?

Once your spa has been filled for the first time, the water needs 18 to 24 hours to heat up to 100 degrees Fahrenheit (38 degrees Celsius).

Once you’ve had your hot tub set up and are using it on a regular basis, you’ll want to keep it in perfect shape. To achieve this, heat the spa to the desired temperature, close it, and leave the thermostat in this setting.

21 TOP Questions & Answers People Always Ask About Ideal Hot Tub Temperature 

What is the best hot tub temperature?

The ideal hot tub temperature is between 35°C and 38°C. However, some people like their hot water a little bit hotter or a little bit colder. That’s why picking a comfortable temperature is crucial. Most people like a hot tub that is 36°C. It’s warm enough to calm your body but not so warm that you can’t endure the full session. 

To keep your hot tub at your desired temperature efficiently, a cover is necessary. Insulated covers trap heat inside. Preventing heat loss is key to reducing energy costs when the hot tub is not in use. And, of course, you want it to be ready to use when you are, so the cover helps maintain your perfect temperature so your spa is always ready to use.

What is the ideal hot tub temperature for summer?

As we transition into summer, the ideal hot tub temperature is a little bit higher. Depending on where you live, it might be somewhere around 37-38°C. However, you should not go more than 2 degrees above body temperature, as excessive heat can lead to a heat stroke.

What is the ideal hot tub temperature during winter?

Cold weather months bring cold weather and cooler temperatures, so the water temperature should go down too. However, you still want to be able to enjoy a hot tub in winter. You should aim to keep the temperature somewhere around 30°C. That’s how you’ll be able to enjoy your hot tub even during winter. 

What hot tub temperature is safe for pregnancy?

Pregnant women should always keep an eye on the temperature of their water. The optimal temperature for them is around 33°C. It’s crucial for pregnant women to keep the hot tub temperature low because their bodies are more sensitive to changes and irritations. If you’re pregnant, you should definitely keep the water temperature at a minimum.

What hot tub temperature is safe for a baby?

If you have a baby, the ideal hot tub temperature is somewhere around 30°C. At that temperature, your baby can enjoy the therapeutic benefits of a hot tub and you can rest easy knowing that they’re not overheating. You should also keep an eye on their water quality. Make sure to clean your hot tub regularly so that your baby doesn’t get hurt.

What is a safe hot tub temperature for kids?

The ideal hot tub temperature for kids is one that doesn’t exceed 41°C (105°F). Kids are more susceptible to dehydration and overheating than adults, so it’s important to set the hot tub temperature low enough for them to enjoy it safely. If you want to let your children use the hot tub, make sure that you set the temperature as low as possible. The best temperature for kids is around 34°C (93°F).

What is a comfortable hot tub temperature?

Most people find that temperatures between 100 and 104 degrees Fahrenheit are quite comfortable. If the weather is cool, 104 degrees will probably feel perfect. However, if it’s really warm, a temperature of 100 degrees or less can be appropriate.

You should also listen to your own body. You should try out several temperature ranges to see what works best for you, especially if you tend to overheat.

How to adjust hot tub temperature?

These days, most hot tubs include digital or electronic temperature controls. If you want to raise or lower the temperature of the water, you just need to press the appropriate button on the thermostat. The water temperature in certain hot tubs may be controlled by a mechanical thermostat, which must be adjusted by accessing the heater of the spa.

How to increase hot tub temperature faster?

There are several things you can do if you want your hot tub water to warm up faster. Some of them include:Filling up the hot tub with already heated waterTurning the jets on  Using a thermal blanketLeaving the cover onUsing an immersion heater

How to keep the hot tub temperature low?

In hot summer days when you want to soak for a while, but the water is too hot, here are some things you can do to cool down the hot tub water:

  • Keep the hot tub shaded if it is in direct sunlight
  • Open the hot tub cover for a few hours every night 
  • Vent the hot tub by slightly lifting one or more sides of the hot tub cover
  • Place ice in the hot tub for instant cooling effect

It’s better to simply set your thermostat a bit lower. The water should cool off gradually. But if it’s still too hot, those are a few ideas you can try.

How low can the hot tub temperature be?

The lowest temperature that you can set your hot tub to is 33°C (91°F). This is a safe temperature, and it’s also one that’s ideal for cleaning your hot tub. If you’re struggling to lower the temperature any more than this, then you may need to replace the thermostat. The ideal hot tub temperature is between 33°C and 38°C (91°F and 100°F). This is the best range for relaxation, but it’s also not so hot that it can cause any damage to the skin or health.

What hot tub temperature is safe for male fertility?

It is recommended that a temperature of 34.5 degrees Celsius be maintained in order to produce healthy sperm. Hot tub water is typically between 36° and 40°. A decreased sperm count and a less mobile sperm population can result from prolonged exposure to temperatures of this kind.

How to test the hot tub temperature sensor?

Start by turning off all hot tub electricity using the spa pack and breaker. If you don’t turn off your hot tub in advance, you run the danger of electrocution.

  • Activate the 20K setting on your Ohm meter.
  • After locating the wire ends, take the plug out of your board.
  • You should connect your meter leads to the red and green wires.

To determine whether your sensor is operating appropriately in accordance with your hot tub specifications, compare your results to the Resistance vs. Temperature chart.

How to bypass the hot tub temperature sensor?

We don’t recommend doing this because you could create a hot tub that is so hot it is unsafe to use. You could also run up your electricity bill, void your warranty, and damage your equipment.

But, if you insist, you can bypass the sensor on some models by following these steps:

  1. Disconnect the electricity from the circuit breaker or power cable and turn off the hot tub.
  2. Locate the thermostat at the control panel, which resembles a control knob attached to a copper wire, by opening the hot tub access panel.
  3. Use an Allen wrench to turn the adjustment screw on the thermostat’s bottom. Turn the thermostat either in a clockwise or counterclockwise direction to change the temperature.

Why won’t my hot tub temperature go down

If you’re struggling to get your hot tub temperature to drop, then you may need to replace the thermostat. If the thermostat is broken, it will have a voltage of zero. If you don’t see a voltage, then you’ll need to replace it. If you see a voltage, then it may be too high to drop any further. In that case, you’ll need to bypass the sensor. If you see a voltage of 3 volts, you’ll need to connect the positive and negative wires of the sensor together.

Why has the hot tub temperature dropped?

Depending on where you live, the water in your hot tub might actually drop below the normal body temperature. This can happen if you live in a climate with very chilly winters, or if you keep your hot tub outside. The best way to avoid this problem is to install a hot tub cover. This will keep the heat trapped inside.

What is the safe hot tub temperature for heart patients?

Heart patients should avoid keeping their hot tub water temperature at a level where it causes a significant rise in their body temperature. This could easily lead to an excessive increase in heart rate. You’re better off keeping the water around 100 degrees Fahrenheit, or about 38 degrees Celsius. This is just enough for a nice, gentle massage. You should also make sure to stay out of the hot tub for at least one hour after your heart rate has returned to normal.

What is a safe hot tub temperature for high blood pressure?

Similarly to heart conditions, people with high blood pressure should also steer clear from spending too much time in heated water. Heated water can expand blood vessels, lowering your blood pressure. This can overstimulate the heart as it tries to keep up. 

What is the ideal hot tub temperature for dogs?

This is actually a very common question. And it’s a very simple one to answer: you should keep the water temperature between 98 and 102 degrees Fahrenheit, or about 37 and 39 degrees Celsius. Keep in mind, however, that even though dogs love being in water, they do not enjoy being in a hot tub as much. That’s why you should keep the water temperature at the lower end of the spectrum.

What is the tolerable hot tub temperature for seniors?

For the first 10-25 minutes keep the temperature at 100 degrees Fahrenheit for elderly people, then raise the temperature very gradually every 5-10 minutes. You may use a floating thermometer to monitor the temperature of the water.

What temperature should I keep in my hot tub when not using it?

If you’re not going to use your hot tub for an extended period of time, you should consider lowering its temperature. That way, you’ll avoid having to invest in costly repairs when you decide to use it again. You should aim to keep the water temperature between 95 and 100 degrees Fahrenheit. That’s the ideal temperature for long-term storage.

Wrap Up

Keeping the water temperature at the right level is essential if you want to avoid accidents. It’s also important to keep in mind that the hot tub water temperature isn’t the only safety factor. Hot tub humidity levels are just as important, especially for people with sensitive skin. So make sure you keep the right balance of hot and cold water, and the right amount of air in the tub

About The Author:

Manny Brambila

Pool & Spa Expert

Manny has been in the Pool & Spa industry for over 15 years and is considered a pool, swim spa, & hot tub expert. He has been a Certified Pool & Spa Operator (CPO) since 2009 and worked 15 years in aquatic training and development for the largest pool chemical and customer care company. He also has been an outside consultant for the Pool and Spa industry in Chicago, New York and Los Angeles since 2018. In the past few years Manny has become Director of Operations for Epic Hot Tubs with a priority of providing customers with the most reliable information and best service possible.