We always go in December and haven't had a trip yet where we couldn't swim. I do always wrap the grandkids up quick when we are finished, though, and get them changed out of their suits asap. Swimming: It's not a big deal to us, though--we are from Texas and kind of "pooled out" by the fall, but the pools are just so nice at WL--kind of hard to resist, and I love to relax in the hot tub.