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

Tracking Storm System Across the Eastern U.S.

A storm system will continue to produce widespread showers and thunderstorms as it progresses eastward across the central U.S. into the Northeast through the weekend. There are risks of severe thunderstorms and excessive rainfall on Saturday from the Ozarks into the mid-Mississippi River Valley with potential for damaging winds, large hail, tornadoes, and flash flooding. Read More >

Hazardous Weather Conditions

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Partly Cloudy

83°F

28°C

Humidity 63%
Wind Speed E 16 mph
Barometer 30.00 in (1015.7 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 18 Oct 12:53 pm EDT
Extended Forecast for

Key Colony Beach FL

  • This Afternoon

    This Afternoon: A slight chance of showers. Sunny, with a high near 83. East wind around 15 mph. Chance of precipitation is 10%.

    High: 83 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: A chance of showers. Partly cloudy, with a low around 77. East wind around 15 mph. Chance of precipitation is 30%.

    Low: 77 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of showers and thunderstorms. Mostly sunny, with a high near 84. East wind 10 to 15 mph. Chance of precipitation is 40%.

    High: 84 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 77. East wind around 10 mph. Chance of precipitation is 40%.

    Low: 77 °F

    Chance
    Showers

  • Monday

    Monday: A chance of showers and thunderstorms. Mostly sunny, with a high near 85. East wind 5 to 10 mph. Chance of precipitation is 40%.

    High: 85 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers. Partly cloudy, with a low around 78. Chance of precipitation is 40%.

    Low: 78 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers. Sunny, with a high near 84. Chance of precipitation is 30%.

    High: 84 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of showers. Mostly clear, with a low around 78. Chance of precipitation is 10%.

    Low: 78 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers. Sunny, with a high near 84. Chance of precipitation is 10%.

    High: 84 °F

    Slight Chance
    Showers

Detailed Forecast

This Afternoon
A slight chance of showers. Sunny, with a high near 83. East wind around 15 mph. Chance of precipitation is 10%.
Tonight
A chance of showers. Partly cloudy, with a low around 77. East wind around 15 mph. Chance of precipitation is 30%.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 84. East wind 10 to 15 mph. Chance of precipitation is 40%.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 77. East wind around 10 mph. Chance of precipitation is 40%.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 85. East wind 5 to 10 mph. Chance of precipitation is 40%.
Monday Night
A chance of showers. Partly cloudy, with a low around 78. Chance of precipitation is 40%.
Tuesday
A chance of showers. Sunny, with a high near 84. Chance of precipitation is 30%.
Tuesday Night
A slight chance of showers. Mostly clear, with a low around 78. Chance of precipitation is 10%.
Wednesday
A slight chance of showers. Sunny, with a high near 84. Chance of precipitation is 10%.
Wednesday Night
A slight chance of showers. Mostly clear, with a low around 77. Chance of precipitation is 20%.
Thursday
A slight chance of showers. Sunny, with a high near 83. Chance of precipitation is 20%.
Thursday Night
A slight chance of showers. Mostly clear, with a low around 77. Chance of precipitation is 20%.
Friday
A slight chance of showers. Sunny, with a high near 84. 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 ft)
Last Update:
12:15 pm EDT Oct 18, 2025
Forecast Valid:
12pm EDT Oct 18, 2025-6pm EDT Oct 24, 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