FPUS52 KKEY 230801 ZFPKEY Zone Forecasts for the Florida Keys National Weather Service Key West FL 401 AM EDT Mon Mar 23 2026 FLZ076>078-232130- Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys- Including the communities of Key Largo, Marathon, and Key West 401 AM EDT Mon Mar 23 2026 .TODAY...Mostly sunny. Highs in the upper 70s. Northeast winds 5 to 10 mph. .TONIGHT...Mostly clear. Lows in the upper 60s. Variable winds near 5 mph. .TUESDAY...Mostly sunny. Highs in the upper 70s. Northeast winds near 5 mph. .TUESDAY NIGHT...Mostly clear. Lows in the upper 60s. Northeast winds near 5 mph. .WEDNESDAY...Mostly sunny. Highs in the upper 70s. Northeast winds 5 to 10 mph. .WEDNESDAY NIGHT...Mostly clear. Lows near 70. .THURSDAY...Mostly sunny with a slight chance of showers. Highs in the upper 70s. Chance of rain 10 percent. .THURSDAY NIGHT THROUGH FRIDAY NIGHT...Mostly clear. Lows in the lower 70s. Highs in the upper 70s. .SATURDAY...Mostly sunny with a slight chance of showers. Highs near 80. Chance of rain 10 percent. .SATURDAY NIGHT...Partly cloudy with a slight chance of showers. Breezy with lows in the lower 70s. Chance of rain 10 percent. .SUNDAY...Mostly sunny with a slight chance of showers. Windy with highs in the upper 70s. Chance of rain 20 percent. $$