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.

Mostly Cloudy

88°F

31°C

Humidity 70%
Wind Speed SW 8 G 16 mph
Barometer 29.96 in (1014.5 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index100°F (38°C)
Last update 31 Aug 11:53 am EDT
Extended Forecast for

Key Colony Beach FL

  • This Afternoon

    This Afternoon: A chance of showers and thunderstorms. Mostly sunny, with a high near 89. West wind around 10 mph. Chance of precipitation is 50%.

    High: 89 °F

    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 82. Northwest wind 5 to 10 mph. Chance of precipitation is 50%.

    Low: 82 °F

    Chance
    T-storms

  • Labor Day

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

    High: 89 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 82. Northwest wind 5 to 10 mph. Chance of precipitation is 50%.

    Low: 82 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms. Partly sunny, with a high near 89. Northwest wind around 5 mph. Chance of precipitation is 50%.

    High: 89 °F

    Chance
    T-storms

  • Tuesday Night

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

    Low: 82 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms. Partly sunny, with a high near 89. Chance of precipitation is 50%.

    High: 89 °F

    Chance
    T-storms

  • Wednesday Night

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

    Low: 82 °F

    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 50%.

    High: 89 °F

    Chance
    T-storms

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms. Mostly sunny, with a high near 89. West wind around 10 mph. Chance of precipitation is 50%.
Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 82. Northwest wind 5 to 10 mph. Chance of precipitation is 50%.
Labor Day
A chance of showers and thunderstorms. Mostly sunny, with a high near 89. West wind 5 to 10 mph. Chance of precipitation is 50%.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 82. Northwest wind 5 to 10 mph. Chance of precipitation is 50%.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 89. Northwest wind around 5 mph. Chance of precipitation is 50%.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 82. Chance of precipitation is 50%.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 89. Chance of precipitation is 50%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 82. Chance of precipitation is 50%.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 50%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 82. Chance of precipitation is 50%.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 89. Chance of precipitation is 50%.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 82. Chance of precipitation is 50%.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 50%.
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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 am EDT Aug 31, 2025
Forecast Valid:
12pm EDT Aug 31, 2025-6pm EDT Sep 6, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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