What is the weather like?
Wherever you are right now, chances are the weather is better here in the Florida Keys. That’s true even on a summer day. The hottest it’s ever been in Key West is 97º F (36º C), and that was way back in 1880. At the peak of summer, the average high is 89º F (32º C). We don’t have any super-highways or urban sprawl to radiate the sun’s heat. Not only that, but our islands are surrounded by cooling ocean waters.
In the winter, cold fronts can bring frost to mainland Florida, but you can be sure there will be no frost here. Rare winter cold fronts may dip into the 60s and the all-time record low for Key West is 41º F (5º C) was set in 1981. Divers or snorkelers usually get by with a “shortie” wet suit.