What's up with this?

So it was brutally hot for several days in June - enough to put the air conditioning on, which I hate. Now I've been at the beach since last Friday, and it's been downright cold at night; had ONE typical July beach day, but the others have been so cool and windy we didn't really want to stay on the beach too long. But the baby loved having her blowup pool down there, so that was a success!