FPUS52 KKEY 182050 ZFPKEY Zone Forecasts for the Florida Keys National Weather Service Key West FL 350 PM EST Wed Feb 18 2026 FLZ076>078-191215- Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys- Including the communities of Key Largo, Marathon, and Key West 350 PM EST Wed Feb 18 2026 .TONIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 70s. East to southeast winds 5 to 10 mph, becoming southeast. .THURSDAY...Partly cloudy early, then becoming mostly sunny. Highs in the lower 80s. Southeast winds 5 to 10 mph. .THURSDAY NIGHT...Mostly clear. Lows in the lower 70s. Southeast winds 5 to 10 mph. .FRIDAY...Mostly sunny. Highs in the lower 80s. Southeast winds 5 to 10 mph, decreasing to near 5 mph. .FRIDAY NIGHT...Mostly clear. Lows in the lower 70s. Southeast winds 5 to 10 mph. .SATURDAY AND SATURDAY NIGHT...Mostly clear. Highs in the lower 80s. Lows in the lower 70s. .SUNDAY...Mostly sunny with a slight chance of showers. Highs in the lower 80s. Chance of rain 10 percent. .SUNDAY NIGHT...Partly cloudy with a slight chance of showers. Becoming windy. Cooler. Lows in the lower 60s. Chance of rain 10 percent. .MONDAY...Mostly sunny. Windy, becoming breezy. Highs in the upper 60s. .MONDAY NIGHT THROUGH TUESDAY NIGHT...Mostly clear. Lows in the upper 50s. Highs in the upper 60s. .MONDAY NIGHT...Mostly clear and breezy. Cold. Lows in the mid 50s, except near 50 for the Upper Keys. .TUESDAY...Mostly sunny. Breezy in the morning. Highs in the upper 60s. .TUESDAY NIGHT...Mostly clear. Lows in the upper 50s. .WEDNESDAY...Mostly sunny. Highs in the mid 70s. $$