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

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Partly Cloudy

76°F

24°C

Humidity 82%
Wind Speed NE 12 G 24 mph
Barometer 30.07 in (1018.2 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 20 Apr 10:53 pm EDT
Extended Forecast for

Key Colony Beach FL

  • Tonight

    Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Northeast wind around 15 mph. Chance of precipitation is 30%.

    Low: 72 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers. Mostly sunny, with a high near 77. Breezy, with a northeast wind around 20 mph. Chance of precipitation is 30%.

    High: 77 °F

    Chance
    Showers and
    Breezy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 72. Breezy, with an east wind around 20 mph.

    Low: 72 °F

    Partly Cloudy
    and Breezy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 77. East wind around 15 mph.

    High: 77 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of showers. Mostly cloudy, with a low around 72. East wind around 15 mph. Chance of precipitation is 10%.

    Low: 72 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: A slight chance of showers. Mostly cloudy, with a high near 77. Chance of precipitation is 10%.

    High: 77 °F

    Slight Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Chance of precipitation is 30%.

    Low: 72 °F

    Chance
    Showers

  • Friday

    Friday: A slight chance of showers and thunderstorms. Partly sunny, with a high near 78. Chance of precipitation is 10%.

    High: 78 °F

    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers. Partly cloudy, with a low around 74. Chance of precipitation is 10%.

    Low: 74 °F

    Slight Chance
    Showers

Detailed Forecast

Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Northeast wind around 15 mph. Chance of precipitation is 30%.
Tuesday
A chance of showers. Mostly sunny, with a high near 77. Breezy, with a northeast wind around 20 mph. Chance of precipitation is 30%.
Tuesday Night
Partly cloudy, with a low around 72. Breezy, with an east wind around 20 mph.
Wednesday
Mostly sunny, with a high near 77. East wind around 15 mph.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 72. East wind around 15 mph. Chance of precipitation is 10%.
Thursday
A slight chance of showers. Mostly cloudy, with a high near 77. Chance of precipitation is 10%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Chance of precipitation is 30%.
Friday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 78. Chance of precipitation is 10%.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 74. Chance of precipitation is 10%.
Saturday
Mostly sunny, with a high near 80.
Saturday Night
Mostly clear, with a low around 76.
Sunday
Sunny, with a high near 81.
Sunday Night
Mostly clear, with a low around 76.
Monday
Sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Key Colony Beach FL
 24.74°N 81.02°W (Elev. 0 ft)
Last Update:
11:15 pm EDT Apr 20, 2026
Forecast Valid:
11pm EDT Apr 20, 2026-6pm EDT Apr 27, 2026
 
Forecast Discussion
 
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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