FPUS52 KKEY 050800 ZFPKEY Zone Forecasts for the Florida Keys National Weather Service Key West FL 400 AM EDT Tue May 5 2026 FLZ076>078-052345- Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys- Including the communities of Key Largo, Marathon, and Key West 400 AM EDT Tue May 5 2026 .TODAY...Mostly sunny with a slight chance of showers. Highs in the mid 80s. Light and variable winds, becoming west to northwest near 5 mph this afternoon. Chance of rain 10 percent. .TONIGHT...Partly cloudy. Lows in the upper 70s. Northwest winds near 5 mph, becoming southeast after midnight. .WEDNESDAY...Mostly sunny. Highs in the upper 80s. Southeast winds near 5 mph. .WEDNESDAY NIGHT...Mostly clear. Lows near 80. Southeast winds 5 to 10 mph. .THURSDAY...Mostly sunny. Highs in the upper 80s. Southeast winds 5 to 10 mph. .THURSDAY NIGHT AND FRIDAY...Mostly clear. Lows near 80. Highs in the upper 80s. .FRIDAY NIGHT...Partly cloudy. Lows near 80. .SATURDAY...Partly sunny. Highs in the mid 80s. .SATURDAY NIGHT THROUGH SUNDAY NIGHT...Mostly cloudy with a slight chance of showers. Lows near 80. Highs in the upper 80s. Chance of rain 10 percent. .MONDAY...Partly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 10 percent. $$