What should the temperature be for a hot tub unattended?

It is generally not recommended to leave a hot tub unattended at a high temperature. The ideal temperature range for a hot tub when it is in use is typically between 100°F and 104°F (38°C and 40°C). Leaving the hot tub at a high temperature when unattended can increase the risk of overheating, scalding, and other safety concerns.

If you need to leave the hot tub unattended for a short period, it's best to turn the temperature down to a lower setting or turn it off completely. This will help prevent any potential accidents or injuries.