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.

A Few Clouds

80°F

27°C

Humidity 82%
Wind Speed SE 9 mph
Barometer 29.98 in (1015.1 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 22 May 6:53 am EDT
Extended Forecast for

Key Colony Beach FL

  • Today

    Today: A chance of showers and thunderstorms. Mostly sunny, with a high near 86. East wind 10 to 15 mph. Chance of precipitation is 30%.

    High: 86 °F

    Chance
    Showers

  • Tonight

    Tonight: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 81. East wind around 15 mph. Chance of precipitation is 20%.

    Low: 81 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: A chance of showers and thunderstorms. Sunny, with a high near 86. East wind around 10 mph. Chance of precipitation is 30%.

    High: 86 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 81. East wind 10 to 15 mph. Chance of precipitation is 30%.

    Low: 81 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of showers and thunderstorms. Mostly sunny, with a high near 87. East wind around 15 mph. Chance of precipitation is 30%.

    High: 87 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 81. Chance of precipitation is 30%.

    Low: 81 °F

    Chance
    Showers

  • Memorial Day

    Memorial Day: A chance of showers and thunderstorms. Mostly sunny, with a high near 87. Chance of precipitation is 30%.

    High: 87 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 81. Windy. Chance of precipitation is 30%.

    Low: 81 °F

    Chance
    Showers and
    Windy

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms. Partly sunny, with a high near 87. Breezy. Chance of precipitation is 20%.

    High: 87 °F

    Slight Chance
    T-storms and
    Breezy

Detailed Forecast

Today
A chance of showers and thunderstorms. Mostly sunny, with a high near 86. East wind 10 to 15 mph. Chance of precipitation is 30%.
Tonight
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 81. East wind around 15 mph. Chance of precipitation is 20%.
Saturday
A chance of showers and thunderstorms. Sunny, with a high near 86. East wind around 10 mph. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 81. East wind 10 to 15 mph. Chance of precipitation is 30%.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 87. East wind around 15 mph. Chance of precipitation is 30%.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 81. Chance of precipitation is 30%.
Memorial Day
A chance of showers and thunderstorms. Mostly sunny, with a high near 87. Chance of precipitation is 30%.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 81. Windy. Chance of precipitation is 30%.
Tuesday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 87. Breezy. Chance of precipitation is 20%.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 81. Breezy. Chance of precipitation is 50%.
Wednesday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 86. Chance of precipitation is 40%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 80. Chance of precipitation is 40%.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 30%.
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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:
7:15 am EDT May 22, 2026
Forecast Valid:
7am EDT May 22, 2026-6pm EDT May 28, 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