This is our first season with a pool. My 9 yr old and 5 yr old could not wait after the build was complete, they both jumped in and then out quickly when it was 61 in the pool....Youth will do crazy things to young boys I guess. Neighborhood kids and mine were in it for over an hour last Sat. Temp in the pool was in the low 70's. Son talked me into jumping in yesterday so I gave in, temp was 72 in the pool....it was cold! I will wait for 78 or so before I get in again. Temp today was 74 in the pool...still waiting it out, but it's fun to watch the kids enjoy it.