National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Tracking Weekend Storm Impacts

A storm and trailing cold front will continue to slowly move through the Gulf Coast and Southeast U.S. through this weekend with widespread rain showers and isolated thunderstorms. A fast-moving clipper storm may bring several inches of snow to the north-central Plains, Midwest, eastern Great Lakes, and Northeast regions this weekend. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

A Few Clouds

78°F

26°C

Humidity 79%
Wind Speed S 6 mph
Barometer 29.98 in (1015.3 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 5 Dec 6:53 pm EST
Extended Forecast for

Key Colony Beach FL

  • Tonight

    Tonight: Partly cloudy, with a low around 75. Southeast wind around 5 mph.

    Low: 75 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 81. Southeast wind around 5 mph.

    High: 81 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers. Partly cloudy, with a low around 75. Southeast wind around 5 mph. Chance of precipitation is 20%.

    Low: 75 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers. Mostly sunny, with a high near 81. East wind around 5 mph becoming south in the afternoon. Chance of precipitation is 20%.

    High: 81 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers. Mostly cloudy, with a low around 74. Southwest wind 5 to 10 mph. Chance of precipitation is 40%.

    Low: 74 °F

    Chance
    Showers

  • Monday

    Monday: A chance of showers. Mostly cloudy, with a high near 79. Chance of precipitation is 40%.

    High: 79 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of showers. Cloudy, with a low around 70. Chance of precipitation is 20%.

    Low: 70 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers. Mostly cloudy, with a high near 76. Chance of precipitation is 20%.

    High: 76 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers. Mostly cloudy, with a low around 69. Chance of precipitation is 30%.

    Low: 69 °F

    Chance
    Showers

Detailed Forecast

Tonight
Partly cloudy, with a low around 75. Southeast wind around 5 mph.
Saturday
Mostly sunny, with a high near 81. Southeast wind around 5 mph.
Saturday Night
A slight chance of showers. Partly cloudy, with a low around 75. Southeast wind around 5 mph. Chance of precipitation is 20%.
Sunday
A slight chance of showers. Mostly sunny, with a high near 81. East wind around 5 mph becoming south in the afternoon. Chance of precipitation is 20%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 74. Southwest wind 5 to 10 mph. Chance of precipitation is 40%.
Monday
A chance of showers. Mostly cloudy, with a high near 79. Chance of precipitation is 40%.
Monday Night
A slight chance of showers. Cloudy, with a low around 70. Chance of precipitation is 20%.
Tuesday
A slight chance of showers. Mostly cloudy, with a high near 76. Chance of precipitation is 20%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 69. Chance of precipitation is 30%.
Wednesday
A slight chance of showers. Mostly cloudy, with a high near 76. Chance of precipitation is 10%.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 69. Chance of precipitation is 10%.
Thursday
A slight chance of showers. Partly sunny, with a high near 76. Chance of precipitation is 10%.
Thursday Night
Mostly cloudy, with a low around 70.
Friday
Partly sunny, with a high near 77.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Key Colony Beach FL
 24.74°N 81.02°W (Elev. 0 ft)
Last Update:
6:15 pm EST Dec 5, 2025
Forecast Valid:
6pm EST Dec 5, 2025-6pm EST Dec 12, 2025
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation