I was there the same time as the last poster. It was very nice weather and not too crowded generally (except the first night at Wishes), but didn't feel empty either as it was Jersey Week and Soaps Weekend (not sure about the dates for those this year). The weather was warm enough to swim, even in the evenings, but not too hot during the days. The day we left it did get kind of chilly though. It can go either way that time of year but at least it shouldn't ever be crazy hot or crazy chilly! The guide books will tell you it is one of the best times to go It should be GREAT!