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.

Fair

26°C

78°F

Humidity 62%
Wind Speed E 20 km/h
Barometer 1018.5 mb (30.08 in)
Dewpoint 18°C (64°F)
Visibility 16 km
Heat Index27°C (80°F)
Last update 23 Mar 4:53 pm EDT
Extended Forecast for

Key Colony Beach FL

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 25. East wind 15 to 20 km/h.

    High: 25 °C

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 23. East wind 15 to 20 km/h.

    Low: 23 °C

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 28. Southeast wind around 15 km/h.

    High: 28 °C

    Mostly Sunny

  • Monday Night

    Monday Night: A slight chance of showers. Mostly cloudy, with a low around 23. East wind 10 to 15 km/h. Chance of precipitation is 10%.

    Low: 23 °C

    Slight Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers and thunderstorms. Partly sunny, with a high near 28. East wind around 10 km/h. Chance of precipitation is 30%.

    High: 28 °C

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 22. Chance of precipitation is 30%.

    Low: 22 °C

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers and thunderstorms. Mostly sunny, with a high near 27. Chance of precipitation is 30%.

    High: 27 °C

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A slight chance of showers. Mostly clear, with a low around 22. Chance of precipitation is 10%.

    Low: 22 °C

    Slight Chance
    Showers

  • Thursday

    Thursday: A slight chance of showers. Sunny, with a high near 28. Chance of precipitation is 10%.

    High: 28 °C

    Slight Chance
    Showers

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 25. East wind 15 to 20 km/h.
Tonight
Mostly cloudy, with a low around 23. East wind 15 to 20 km/h.
Monday
Mostly sunny, with a high near 28. Southeast wind around 15 km/h.
Monday Night
A slight chance of showers. Mostly cloudy, with a low around 23. East wind 10 to 15 km/h. Chance of precipitation is 10%.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 28. East wind around 10 km/h. Chance of precipitation is 30%.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 22. Chance of precipitation is 30%.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 27. Chance of precipitation is 30%.
Wednesday Night
A slight chance of showers. Mostly clear, with a low around 22. Chance of precipitation is 10%.
Thursday
A slight chance of showers. Sunny, with a high near 28. Chance of precipitation is 10%.
Thursday Night
A slight chance of showers. Mostly clear, with a low around 22. Chance of precipitation is 10%.
Friday
A slight chance of showers. Mostly sunny, with a high near 27. Breezy. Chance of precipitation is 10%.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 22. Breezy. Chance of precipitation is 10%.
Saturday
A slight chance of showers. Mostly sunny, with a high near 28. Chance of precipitation is 10%.
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ABOUT THIS FORECAST

 
Point Forecast:
Key Colony Beach FL
 24.71°N 81.02°W (Elev. 0 m)
Last Update:
4:15 pm EDT Mar 23, 2025
Forecast Valid:
4pm EDT Mar 23, 2025-6pm EDT Mar 29, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation