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

Record Breaking Temperatures and Critical Fire Weather

More than 200 record or near record maximum temperatures are forecast across the southern half of the U.S. through the end of this week before additional record temperatures center back over the Southwest U.S. into the Rockies this weekend. Widespread record breaking warmth, low humidity, and gusty winds will produce critical fire weather today in the central Rockies to Plains. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

76°F

24°C

Humidity 62%
Wind Speed N 6 mph
Barometer 30.11 in (1019.4 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 25 Mar 9:53 am EDT
Extended Forecast for

Marathon Shores FL

  • Today

    Today: Sunny, with a high near 79. East wind around 5 mph.

    High: 79 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 69. East wind around 10 mph.

    Low: 69 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 80. East wind around 10 mph.

    High: 80 °F

    Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers. Mostly clear, with a low around 71. East wind around 10 mph. Chance of precipitation is 10%.

    Low: 71 °F

    Slight Chance
    Showers

  • Friday

    Friday: A slight chance of showers. Sunny, with a high near 80. East wind around 10 mph. Chance of precipitation is 10%.

    High: 80 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of showers. Mostly clear, with a low around 72. Chance of precipitation is 10%.

    Low: 72 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers. Sunny, with a high near 80. Chance of precipitation is 10%.

    High: 80 °F

    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: A slight chance of showers. Mostly clear, with a low around 71. Chance of precipitation is 10%.

    Low: 71 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: A chance of showers. Mostly sunny, with a high near 79. Chance of precipitation is 30%.

    High: 79 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 79. East wind around 5 mph.
Tonight
Mostly clear, with a low around 69. East wind around 10 mph.
Thursday
Sunny, with a high near 80. East wind around 10 mph.
Thursday Night
A slight chance of showers. Mostly clear, with a low around 71. East wind around 10 mph. Chance of precipitation is 10%.
Friday
A slight chance of showers. Sunny, with a high near 80. East wind around 10 mph. Chance of precipitation is 10%.
Friday Night
A slight chance of showers. Mostly clear, with a low around 72. Chance of precipitation is 10%.
Saturday
A slight chance of showers. Sunny, with a high near 80. Chance of precipitation is 10%.
Saturday Night
A slight chance of showers. Mostly clear, with a low around 71. Chance of precipitation is 10%.
Sunday
A chance of showers. Mostly sunny, with a high near 79. Chance of precipitation is 30%.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 71. Breezy. Chance of precipitation is 20%.
Monday
A slight chance of showers. Mostly sunny, with a high near 79. Chance of precipitation is 10%.
Monday Night
Partly cloudy, with a low around 71.
Tuesday
Mostly sunny, with a high near 79.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marathon Shores FL
 24.72°N 81.05°W (Elev. 0 ft)
Last Update:
10:15 am EDT Mar 25, 2026
Forecast Valid:
10am EDT Mar 25, 2026-6pm EDT Mar 31, 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