Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Hazardous Weather Conditions

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

65°F

18°C

Humidity 81%
Wind Speed N 12 G 24 mph
Barometer 30.04 in (1017.1 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 20 Mar 8:53 am EDT
Extended Forecast for

Key Colony Beach FL

  • Today

    Today: A slight chance of showers.  Sunny, with a high near 74. Breezy, with a northeast wind 15 to 20 mph.  Chance of precipitation is 20%.

    High: 74 °F

    Slight Chance
    Showers and
    Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 65. Northeast wind around 15 mph.

    Low: 65 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 75. North wind 10 to 15 mph.

    High: 75 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 69. Northeast wind 5 to 10 mph.

    Low: 69 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 76. Northeast wind around 5 mph.

    High: 76 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 69.

    Low: 69 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

Detailed Forecast

Today
A slight chance of showers. Sunny, with a high near 74. Breezy, with a northeast wind 15 to 20 mph. Chance of precipitation is 20%.
Tonight
Mostly clear, with a low around 65. Northeast wind around 15 mph.
Saturday
Sunny, with a high near 75. North wind 10 to 15 mph.
Saturday Night
Mostly clear, with a low around 69. Northeast wind 5 to 10 mph.
Sunday
Sunny, with a high near 76. Northeast wind around 5 mph.
Sunday Night
Mostly clear, with a low around 70.
Monday
Sunny, with a high near 76.
Monday Night
Mostly clear, with a low around 69.
Tuesday
Sunny, with a high near 76.
Tuesday Night
Mostly clear, with a low around 70.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Mostly clear, with a low around 71.
Thursday
Sunny, with a high near 77.
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ABOUT THIS FORECAST

 
Point Forecast:
Key Colony Beach FL
 24.74°N 81.02°W (Elev. 0 ft)
8:15 am EDT Mar 20, 2026
8am EDT Mar 20, 2026-6pm EDT Mar 26, 2026
 
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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