The only thing worse than getting into a hot tub that is too hot is getting into one that is too cold! So what is the right water temperature for hot tub? It really depends on your personal preference for the most part.
The boundaries that most hot tubs have with regard to temperature are between the very high point of 40 degrees Celsius and a lower range of about seven degrees before the pumps and jets kick in to prevent the tub from freezing. Most likely, nobody would want to sit in a hot tub in the seven degree range. At the other end of the spectrum, 40 degrees is the industry agreed maximum as anything higher can lead to potential health hazards.
Studies have shown that, for the most part, women will prefer a temperature that is slightly higher than men prefer. Of course, that is not always the case, but generally that is true. Women usually prefer a temperature around 38-39 degrees, not far off the mark of the maximum setting on the majority of hot tubs.
Many hot tub installers will tell you that when they install a spa and set it for the first time, they generally set the temperature to 38 degrees. This is the temperature that seems to be the most comfortable to enter into and allows for the temperature drop that hot tubs will experience when people enter into the hot tub.
The ability to lower the temperature in the very hot summer months is a great benefit as well. There is nothing that says you have to keep the temperature at the highest level during the summer months. As long as you maintain the water as you would normally, there is no reason why you cannot lower the temperature and enjoy your hot tub like a small cooling pool during the summer. You could reap the benefits of cooling down all the while saving on heating costs!
The fact of the matter is there is no one size fits all temperature that will please everyone. Your personal preference is what matters after all. Choose the temperature that works best for you, your family, and friends. Your comfort is the best answer to the question!