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 69%
Wind Speed Vrbl 7 mph
Barometer 30.15 in (1021.0 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 28 Mar 12:53 pm EDT
Extended Forecast for

Marathon Shores 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 chance of showers and thunderstorms. Partly cloudy, with a low around 73. East wind around 10 mph. Chance of precipitation is 30%.

    Low: 73 °F

    Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 82. East wind 10 to 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. East wind around 15 mph. Chance of precipitation is 30%.

    Low: 73 °F

    Chance
    Showers

  • 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. Chance of precipitation is 40%.

    Low: 73 °F

    Chance
    Showers

  • Tuesday

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

    High: 82 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 73.

    Low: 73 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 81.

    High: 81 °F

    Mostly Cloudy

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 chance of showers and thunderstorms. Partly cloudy, with a low around 73. East wind around 10 mph. Chance of precipitation is 30%.
Sunday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 82. East wind 10 to 15 mph. Chance of precipitation is 20%.
Sunday Night
A chance of showers. Mostly clear, with a low around 73. East wind around 15 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. Chance of precipitation is 40%.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 82. Chance of precipitation is 30%.
Tuesday Night
Mostly cloudy, with a low around 73.
Wednesday
Mostly cloudy, with a high near 81.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 74. Chance of precipitation is 10%.
Thursday
Mostly sunny, with a high near 81.
Thursday Night
A slight chance of showers. Partly cloudy, with a low around 73. Chance of precipitation is 20%.
Friday
Mostly sunny, with a high near 82.
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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:
12:15 pm EDT Mar 28, 2026
Forecast Valid:
1pm EDT Mar 28, 2026-6pm EDT Apr 3, 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