FPUS52 KKEY 110800 ZFPKEY Zone Forecasts for the Florida Keys National Weather Service Key West FL 400 AM EDT Wed Mar 11 2026 FLZ076>078-112200- Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys- Including the communities of Key Largo, Marathon, and Key West 400 AM EDT Wed Mar 11 2026 .TODAY...Mostly sunny. Highs in the lower to mid 80s. East to southeast winds near 15 mph. .TONIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 70s. East to southeast winds near 15 mph, becoming southeast and decreasing to 10 to 15 mph. .THURSDAY...Partly cloudy with a slight chance of showers. Highs in the lower to mid 80s. Southeast winds near 10 mph, becoming south to southwest and decreasing to 5 to 10 mph. Chance of rain 10 percent. .THURSDAY NIGHT...Partly to mostly cloudy with a slight chance of showers. Lows in the lower to mid 70s. Variable winds near 5 mph. Chance of rain 20 percent. .FRIDAY...Partly cloudy with a chance of showers. Highs in the lower 80s. Northeast to east winds 5 to 10 mph, becoming southeast. Chance of rain 30 percent. .FRIDAY NIGHT THROUGH SUNDAY NIGHT...Mostly cloudy with a chance of showers and a slight chance of thunderstorms. Lows in the mid 70s. Highs in the lower 80s. Chance of rain 40 percent. .MONDAY...Mostly sunny with a chance of showers and a slight chance of thunderstorms. Highs in the lower 80s. Chance of rain 40 percent. .MONDAY NIGHT AND TUESDAY...Mostly cloudy. A chance of showers and a slight chance of thunderstorms. Lows in the upper 60s. Highs in the upper 70s. Chance of rain 40 percent. $$ MJV