FPUS52 KKEY 231956 ZFPKEY Zone Forecasts for the Florida Keys National Weather Service Key West FL 356 PM EDT Sun Aug 23 2026 FLZ076>078-241015- Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys- Including the communities of Key Largo, Marathon, and Key West 356 PM EDT Sun Aug 23 2026 .TONIGHT...Mostly clear with a slight chance of showers and thunderstorms. Lows in the lower to mid 80s. Southeast to south winds 5 to 10 mph, becoming east to southeast. Chance of rain 10 percent. .MONDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs near 90. East to southeast winds 5 to 10 mph, increasing to near 10 mph. Chance of rain 10 percent. .MONDAY NIGHT...Mostly clear with a slight chance of showers and thunderstorms. Lows in the lower to mid 80s. East to southeast winds 10 to 15 mph. Chance of rain 20 percent. .TUESDAY...Mostly sunny with a chance of showers and a slight chance of thunderstorms. Highs near 90. East to southeast winds 10 to 15 mph. Chance of rain 30 percent. .TUESDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms. Lows in the lower 80s. East to southeast winds 10 to 15 mph. Chance of rain 50 percent. .WEDNESDAY...Partly cloudy with a chance of showers and thunderstorms. Highs near 90. Chance of rain 50 percent. .WEDNESDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms. Lows in the lower 80s. Chance of rain 50 percent. .THURSDAY THROUGH FRIDAY...Partly cloudy with a chance of showers and thunderstorms. Highs near 90. Lows in the lower to mid 80s. Chance of rain 30 percent. .FRIDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms. Lows in the lower to mid 80s. Highs in the lower 90s. Chance of rain 40 percent. .SATURDAY...Partly cloudy with a chance of showers and thunderstorms. Highs near 90. Chance of rain 50 percent. .SATURDAY NIGHT...Showers likely with a chance of thunderstorms. Lows in the lower 80s. Chance of rain 70 percent. .SUNDAY...Showers likely with a chance of thunderstorms. Highs near 90. Chance of rain 60 percent. $$ BT/MJV/AJP