April in Key West: Sunshine, Sea Temps, and Slightly Fewer Tourists Ahhh, April in Key West. Spring is in the air, we’ve sprung ahead, and the Florida sun hasn’t yet cranked itself up to "hottest day of the year" mode. You’ve still got that mild temperatures magic, a refreshing breeze off the water, and—bonus!—fewer people fighting you for the last slice of key lime pie. So what’s Key West...