FPUS52 KKEY 200801 ZFPKEY Zone Forecasts for the Florida Keys National Weather Service Key West FL 401 AM EDT Fri Mar 20 2026 FLZ076>078-202315- Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys- Including the communities of Key Largo, Marathon, and Key West 401 AM EDT Fri Mar 20 2026 .TODAY...Mostly sunny with a slight chance of showers. Breezy. Highs in the mid 70s. Northeast winds 15 to 20 mph. Chance of rain 10 percent. .TONIGHT...Mostly clear. Lows in the mid 60s. North to northeast winds 10 to 15 mph. .SATURDAY...Mostly sunny. Highs in the mid 70s. North to northeast winds near 10 mph, decreasing to 5 to 10 mph. .SATURDAY NIGHT...Mostly clear. Lows in the upper 60s. Northeast winds 5 to 10 mph. .SUNDAY...Mostly sunny. Highs in the upper 70s. Northeast winds 5 to 10 mph. .SUNDAY NIGHT THROUGH TUESDAY NIGHT...Mostly clear. Lows near 70. Highs in the upper 70s. .WEDNESDAY...Mostly sunny with a slight chance of showers. Highs near 80. Chance of rain 10 percent. .WEDNESDAY NIGHT...Mostly clear. Lows in the lower 70s. .THURSDAY...Mostly sunny with a slight chance of showers. Highs near 80. Chance of rain 10 percent. $$