FPUS52 KKEY 202002 ZFPKEY Zone Forecasts for the Florida Keys National Weather Service Key West FL 402 PM EDT Fri Mar 20 2026 FLZ076>078-211200- Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys- Including the communities of Key Largo, Marathon, and Key West 402 PM EDT Fri Mar 20 2026 .TONIGHT...Mostly clear. Breezy early. Lows in the mid 60s. North to northeast winds 15 to 20 mph, decreasing to near 15 mph. .SATURDAY...Mostly sunny. Highs in the mid 70s. North to northeast winds 10 to 15 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 to east winds 5 to 10 mph. .SUNDAY NIGHT...Mostly clear. Lows near 70. Northeast to east winds 5 to 10 mph. .MONDAY THROUGH TUESDAY NIGHT...Mostly clear. Highs in the upper 70s. Lows near 70. .WEDNESDAY THROUGH FRIDAY...Partly cloudy with a slight chance of showers. Highs near 80. Lows in the lower 70s. Chance of rain 10 percent. $$ BT/AP