Most hot tub users set their hot tubs water temperature at temperatures that range between 100°F-102°F.
The maximum temperature for a hot tub is 104 F.
I like my hot tubs temperature to be 100 F which is good enough for me and works well for relaxing my muscles and back.
During the winter months I might bring the hot tub water temperature up to 104 F but during the warmer months and in summer I keep it at 100 F.
If you set the temperature of the hot tub too hot then your body could overheat which could lead to a lot of health issues and possible heat stroke and death.
Always take a break from your hot tub every 30 minutes to an hour in the hot tub to avoid overheating in the hot tub.