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

Hazardous Weather Conditions

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

31°C

87°F

Humidity 70%
Wind Speed Vrbl 6 km/h
Barometer 1013.2 mb (29.92 in)
Dewpoint 24°C (76°F)
Visibility 16 km
Heat Index37°C (98°F)
Last update 6 Sep 1:53 pm EDT
Extended Forecast for

Key Colony Beach FL

  • This Afternoon

    This Afternoon: A chance of showers and thunderstorms. Partly sunny, with a high near 32. Calm wind. Chance of precipitation is 50%.

    High: 32 °C

    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 28. Calm wind. Chance of precipitation is 40%.

    Low: 28 °C

    Chance
    T-storms

  • Labor Day

    Labor Day: A chance of showers and thunderstorms. Partly sunny, with a high near 32. Calm wind. Chance of precipitation is 40%.

    High: 32 °C

    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 28. Calm wind. Chance of precipitation is 40%.

    Low: 28 °C

    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms. Mostly sunny, with a high near 32. Calm wind. Chance of precipitation is 30%.

    High: 32 °C

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 28. Chance of precipitation is 30%.

    Low: 28 °C

    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms. Sunny, with a high near 32. Chance of precipitation is 30%.

    High: 32 °C

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 29. Chance of precipitation is 40%.

    Low: 29 °C

    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms. Mostly sunny, with a high near 32. Chance of precipitation is 30%.

    High: 32 °C

    Chance
    T-storms

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms. Partly sunny, with a high near 32. Calm wind. Chance of precipitation is 50%.
Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 28. Calm wind. Chance of precipitation is 40%.
Labor Day
A chance of showers and thunderstorms. Partly sunny, with a high near 32. Calm wind. Chance of precipitation is 40%.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 28. Calm wind. Chance of precipitation is 40%.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 32. Calm wind. Chance of precipitation is 30%.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 28. Chance of precipitation is 30%.
Wednesday
A chance of showers and thunderstorms. Sunny, with a high near 32. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 29. Chance of precipitation is 40%.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 32. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 28. Chance of precipitation is 40%.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 32. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 28. Chance of precipitation is 40%.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 32. Chance of precipitation is 20%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Key Colony Beach FL
 24.71°N 81.02°W (Elev. 0 m)
Last Update:
1:15 pm EDT Sep 6, 2026
Forecast Valid:
2pm EDT Sep 6, 2026-6pm EDT Sep 12, 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