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.

Thunderstorm

85°F

29°C

Humidity 77%
Wind Speed N 8 mph
Barometer 30.12 in (1019.8 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index96°F (36°C)
Last update 5 Aug 4:53 pm EDT
Extended Forecast for

Key Colony Beach FL

  • This Afternoon

    This Afternoon: A chance of showers and thunderstorms. Sunny, with a high near 90. East wind around 5 mph. Chance of precipitation is 40%.

    High: 90 °F

    Chance
    Showers

  • Tonight

    Tonight: A chance of showers and thunderstorms. Mostly clear, with a low around 84. East wind 5 to 10 mph. Chance of precipitation is 40%.

    Low: 84 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers and thunderstorms. Mostly sunny, with a high near 90. East wind 5 to 10 mph. Chance of precipitation is 50%.

    High: 90 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 82. East wind around 10 mph. Chance of precipitation is 50%.

    Low: 82 °F

    Chance
    Showers

  • Thursday

    Thursday: A chance of showers and thunderstorms. Mostly sunny, with a high near 89. East wind 5 to 10 mph. Chance of precipitation is 50%.

    High: 89 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 82. Chance of precipitation is 50%.

    Low: 82 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 50%.

    High: 88 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 82. Chance of precipitation is 50%.

    Low: 82 °F

    Chance
    Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms. Partly sunny, with a high near 88. Chance of precipitation is 50%.

    High: 88 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms. Sunny, with a high near 90. East wind around 5 mph. Chance of precipitation is 40%.
Tonight
A chance of showers and thunderstorms. Mostly clear, with a low around 84. East wind 5 to 10 mph. Chance of precipitation is 40%.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 90. East wind 5 to 10 mph. Chance of precipitation is 50%.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 82. East wind around 10 mph. Chance of precipitation is 50%.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 89. East wind 5 to 10 mph. Chance of precipitation is 50%.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 82. Chance of precipitation is 50%.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 50%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 82. Chance of precipitation is 50%.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 88. Chance of precipitation is 50%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 81. Chance of precipitation is 40%.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 88. Chance of precipitation is 40%.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 82. Chance of precipitation is 40%.
Monday
A chance of showers and thunderstorms. Sunny, with a high near 89. Chance of precipitation is 40%.
Monday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 83. Chance of precipitation is 40%.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 40%.
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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 ft)
Last Update:
5:15 pm EDT Aug 5, 2025
Forecast Valid:
5pm EDT Aug 5, 2025-6pm EDT Aug 12, 2025
 
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