Wondering what the average hot tub temperature should be? Here is a simple UK guide to the usual range, comfort levels and safe adjustments for different bathers.
For most adults, the average hot tub temperature sits around 37°C to 38°C. That range feels properly warm without being as intense as the highest settings, so it suits everyday soaking for many UK hot tub owners.
If you want a simple starting point, set your hot tub to 37°C and see how it feels after 10 to 15 minutes. If you prefer a hotter soak, move it up gradually rather than jumping straight to the maximum.
The best temperature is not always the same as the average temperature. The right setting depends on how long you plan to stay in, how warm the day is and who is using the tub.
A lower setting is often more comfortable than people expect, especially once the jets are running and the cover has been off for a few minutes.
40°C is usually considered the top end for a domestic hot tub, and it can feel very hot very quickly. Many people find it is too much for a long soak, especially if they are not used to hotter water.
If you choose a hotter setting, keep the session short and pay attention to how you feel. Comfort and safety matter more than pushing the temperature as high as it can go.
UK weather can change how your hot tub feels. A setting that seems perfect on a cold winter evening may feel too warm in mild or sunny conditions.
It also helps to avoid changing the set point too often. Once you know your preferred range, keeping the water stable makes the hot tub easier to manage day to day.
Temperature is only one part of a good hot tub session. Clean, balanced water and sensible soak times make a big difference to comfort.
If your water chemistry is out of balance, the hot tub can feel less comfortable on the skin and eyes even when the temperature is right. Good maintenance helps the whole spa feel better to use.
Most people keep a hot tub around 37°C to 38°C for regular use. That is a comfortable average for many adults.
Yes, 38°C is a common setting and suits many adults for a standard soak. If it feels too warm, lower it by 1°C and test again.
Many people prefer 38°C to 39°C in colder weather because the air temperature is lower. Even then, comfort varies, so adjust gradually.
No, children should use cooler water and be supervised closely. A lower temperature and shorter time in the tub is the safer approach.
Expert guides on hot tub and pool water care, sanitisation, balancing, troubleshooting and seasonal maintenance from the ClearSpa team.