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

Fire Weather Concerns; Record Warmth Spreads

The Plains to the mid-Mississippi Valley continue with warm and dry conditions. Any fires that initiate could spread quickly. The warm temperatures will expand across the Southern Plains into the Southwest where numerous records are expected through the weekend. Meanwhile, a cold front will move southward across the northern Plains and Great Lakes region where some snow will develop 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 76%
Wind Speed S 6 mph
Barometer 29.97 in (1015.0 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 28 Feb 12:53 pm EST
Extended Forecast for

Key Colony Beach FL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 78. South wind around 5 mph becoming calm.

    High: 78 °F

    Mostly Sunny

  • Tonight

    Tonight: Patchy fog before 1am. Otherwise, mostly cloudy, with a low around 69. North wind around 5 mph.

    Low: 69 °F

    Patchy Fog

  • Sunday

    Sunday: A slight chance of showers. Mostly cloudy, then gradually becoming sunny, with a high near 77. North wind around 5 mph. Chance of precipitation is 10%.

    High: 77 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: A slight chance of showers. Partly cloudy, with a low around 70. Northeast wind 10 to 15 mph. Chance of precipitation is 20%.

    Low: 70 °F

    Slight Chance
    Showers

  • Monday

    Monday: A slight chance of showers. Sunny, with a high near 78. Northeast wind 10 to 15 mph. Chance of precipitation is 10%.

    High: 78 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of showers. Mostly clear, with a low around 70. Chance of precipitation is 10%.

    Low: 70 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers. Sunny, with a high near 78. Chance of precipitation is 20%.

    High: 78 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of showers. Partly cloudy, with a low around 71. Chance of precipitation is 20%.

    Low: 71 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers. Sunny, with a high near 78. Chance of precipitation is 20%.

    High: 78 °F

    Slight Chance
    Showers

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 78. South wind around 5 mph becoming calm.
Tonight
Patchy fog before 1am. Otherwise, mostly cloudy, with a low around 69. North wind around 5 mph.
Sunday
A slight chance of showers. Mostly cloudy, then gradually becoming sunny, with a high near 77. North wind around 5 mph. Chance of precipitation is 10%.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 70. Northeast wind 10 to 15 mph. Chance of precipitation is 20%.
Monday
A slight chance of showers. Sunny, with a high near 78. Northeast wind 10 to 15 mph. Chance of precipitation is 10%.
Monday Night
A slight chance of showers. Mostly clear, with a low around 70. Chance of precipitation is 10%.
Tuesday
A slight chance of showers. Sunny, with a high near 78. Chance of precipitation is 20%.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 71. Chance of precipitation is 20%.
Wednesday
A slight chance of showers. Sunny, with a high near 78. Chance of precipitation is 20%.
Wednesday Night
A slight chance of showers. Mostly clear, with a low around 72. Chance of precipitation is 20%.
Thursday
A slight chance of showers. Sunny, with a high near 78. Chance of precipitation is 10%.
Thursday Night
A slight chance of showers. Partly cloudy, with a low around 72. Chance of precipitation is 20%.
Friday
A slight chance of showers. Mostly sunny, with a high near 78. Chance of precipitation is 10%.
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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:
1:15 pm EST Feb 28, 2026
Forecast Valid:
1pm EST Feb 28, 2026-6pm EST Mar 6, 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