Based on wmcall's response, I obviously have a "pool" in the summer months.
I like mine at around 92* when I get in so it nice and refreshing. It will creap up to about 98* by the time we exit after about 2 hours of relaxation. If you have it too warm/hot, I don't think you are supposed to "enjoy" it that long at a time, so we want to be able to stay in it longer. During the winter months, we keep it around 98*-100*.