I think the only places I'm happy during the hotter months of the year like August are the movies or a waterpark.I went to Aquatica this year during August on one of the hottest days of the year,temperatures in the 96-100 range and heat indexes in the 112-120 range,my car's thermometer read 103 and the wavepools at Aquatica also have thermometers which read 100 most of the day.I had to buy sandals at the gift shop as by 12-1pm the ground became like lava,now I had been to waterparks before without sandals and the ground gets hot,I knew that going in but in my 100's of other times visiting a waterpark I had never seen the ground get like it did that day.I'm from Florida and have AP's so while I may not like the theme parks this time of year if it's the only time you can go,you definitely should go and make the best of it,many people use the go early,do the major rides and go back to the hotel between 1pm and 4pm to go in the pool and relax to go back to the parks for the night.