I have been swimming in the last week since we finally got our pool set up, the season is still young for us here in Australia, so the first time it was around 62. I had to fetch out some stuff that had fallen in though lol. Yesterday I went swimming for fun at 68, it was chilly but bearable. I'll have to see how the season goes and find my perfect temperature, but off my trial runs I think around 77 would be nice.