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

Critical Fire Weather in the Plains; Unseasonably Warm in the Southwest and Southern U.S.

Unseasonably warm temperatures continue through the weekend across the Southwest and southern U.S., with more than 100 record or near record maximum temperatures forecast through the rest of the week and over the weekend. Elevated to critical fire weather conditions will persist across the Plains and Southeast U.S. this weekend. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

80°F

27°C

Humidity 67%
Wind Speed E 10 mph
Barometer 30.07 in (1018.1 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 28 Mar 4:53 pm EDT
Extended Forecast for

Key Colony Beach FL

  • This Afternoon

    This Afternoon: A slight chance of showers. Sunny, with a high near 82. East wind around 10 mph. Chance of precipitation is 10%.

    High: 82 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: A slight chance of showers, then a chance of showers and thunderstorms after 8pm. Partly cloudy, with a steady temperature around 80. East wind 10 to 15 mph. Chance of precipitation is 30%.

    Low: 80 °F

    Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 82. East wind around 15 mph. Chance of precipitation is 20%.

    High: 82 °F

    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers. Mostly clear, with a low around 73. Breezy, with an east wind 15 to 20 mph. Chance of precipitation is 30%.

    Low: 73 °F

    Chance
    Showers and
    Breezy

  • Monday

    Monday: A chance of showers and thunderstorms. Mostly sunny, with a high near 82. East wind around 15 mph. Chance of precipitation is 40%.

    High: 82 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 73. Breezy. Chance of precipitation is 40%.

    Low: 73 °F

    Chance
    Showers and
    Breezy

  • Tuesday

    Tuesday: A chance of showers and thunderstorms. Mostly sunny, with a high near 82. Breezy. Chance of precipitation is 30%.

    High: 82 °F

    Chance
    Showers and
    Breezy

  • Tuesday Night

    Tuesday Night: A slight chance of showers. Mostly cloudy, with a low around 73. Windy. Chance of precipitation is 10%.

    Low: 73 °F

    Slight Chance
    Showers and
    Windy

  • Wednesday

    Wednesday: A slight chance of showers. Mostly cloudy, with a high near 79. Breezy. Chance of precipitation is 10%.

    High: 79 °F

    Slight Chance
    Showers and
    Breezy

Detailed Forecast

This Afternoon
A slight chance of showers. Sunny, with a high near 82. East wind around 10 mph. Chance of precipitation is 10%.
Tonight
A slight chance of showers, then a chance of showers and thunderstorms after 8pm. Partly cloudy, with a steady temperature around 80. East wind 10 to 15 mph. Chance of precipitation is 30%.
Sunday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 82. East wind around 15 mph. Chance of precipitation is 20%.
Sunday Night
A chance of showers. Mostly clear, with a low around 73. Breezy, with an east wind 15 to 20 mph. Chance of precipitation is 30%.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 82. East wind around 15 mph. Chance of precipitation is 40%.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 73. Breezy. Chance of precipitation is 40%.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 82. Breezy. Chance of precipitation is 30%.
Tuesday Night
A slight chance of showers. Mostly cloudy, with a low around 73. Windy. Chance of precipitation is 10%.
Wednesday
A slight chance of showers. Mostly cloudy, with a high near 79. Breezy. Chance of precipitation is 10%.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 74. Breezy. Chance of precipitation is 20%.
Thursday
A slight chance of showers. Partly sunny, with a high near 79. Breezy. Chance of precipitation is 20%.
Thursday Night
A slight chance of showers. Mostly cloudy, with a low around 74. Breezy. Chance of precipitation is 20%.
Friday
A slight chance of showers. Mostly sunny, with a high near 79. Breezy. Chance of precipitation is 20%.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 74. Breezy. Chance of precipitation is 20%.
Saturday
A slight chance of showers. Mostly sunny, with a high near 79. Breezy. Chance of precipitation is 20%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Key Colony Beach FL
 24.74°N 81.02°W (Elev. 0 ft)
Last Update:
5:15 pm EDT Mar 28, 2026
Forecast Valid:
5pm EDT Mar 28, 2026-6pm EDT Apr 4, 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