A summer breeze, please

Spent last week in Belize, and I'm already pining for 80-degree days again.
That's where movies come in.
No matter the time of year, watching "Jaws" reminds me of summer. The beach scenes, the lazy pace of people on vacation ... even the boat vs. shark battle somehow brings calm, summer nights to mind.
What films blast past winter and put you in a summer state of mind?