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 >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

66°F

19°C

Humidity 78%
Wind Speed N 9 mph
Barometer 30.03 in (1016.7 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 21 Mar 4:53 am EDT
Extended Forecast for

Marathon Shores FL

  • Today

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

    High: 75 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 67. North wind around 10 mph.

    Low: 67 °F

    Mostly Clear

  • Sunday

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

    High: 76 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 68. East wind around 5 mph.

    Low: 68 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 77. Northeast wind around 5 mph.

    High: 77 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Tuesday Night

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

    Low: 70 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 75. North wind 10 to 15 mph.
Tonight
Mostly clear, with a low around 67. North wind around 10 mph.
Sunday
Sunny, with a high near 76. North wind around 5 mph.
Sunday Night
Mostly clear, with a low around 68. East wind around 5 mph.
Monday
Sunny, with a high near 77. Northeast wind around 5 mph.
Monday Night
Mostly clear, with a low around 67.
Tuesday
Sunny, with a high near 78.
Tuesday Night
Mostly clear, with a low around 70.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Mostly clear, with a low around 70.
Thursday
Sunny, with a high near 79.
Thursday Night
Mostly clear, with a low around 71.
Friday
Sunny, with a high near 79.
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ABOUT THIS FORECAST

 
Point Forecast:
Marathon Shores FL
 24.74°N 81.04°W (Elev. 0 ft)
4:15 am EDT Mar 21, 2026
5am EDT Mar 21, 2026-6pm EDT Mar 27, 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