FPUS52 KKEY 221954 ZFPKEY Zone Forecasts for the Florida Keys National Weather Service Key West FL 354 PM EDT Sun Mar 22 2026 FLZ076>078-231100- Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys- Including the communities of Key Largo, Marathon, and Key West 354 PM EDT Sun Mar 22 2026 .TONIGHT...Mostly clear. Lows in the upper 60s. Northeast winds 5 to 10 mph. .MONDAY...Mostly sunny. Highs in the upper 70s. North to northeast winds 5 to 10 mph. .MONDAY NIGHT...Mostly clear. Lows in the upper 60s. North to northeast winds 5 to 10 mph. .TUESDAY...Mostly sunny. Highs in the upper 70s. Northeast winds 5 to 10 mph. .TUESDAY NIGHT...Mostly clear. Lows near 70. Northeast to east winds 5 to 10 mph. .WEDNESDAY THROUGH FRIDAY...Mostly clear. Highs near 80. Lows in the lower 70s. .FRIDAY NIGHT...Partly cloudy. Lows in the lower 70s. .SATURDAY...Mostly sunny with a slight chance of showers. Highs near 80. Chance of rain 10 percent. .SATURDAY NIGHT AND SUNDAY...Partly cloudy. A slight chance of showers. Breezy. Lows in the lower 70s. Highs near 80. Chance of rain 20 percent. $$ LIW/AP