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

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

75°F

24°C

Humidity 62%
Wind Speed E 12 mph
Barometer 29.99 in (1015.4 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 23 Apr 10:53 pm EDT
Extended Forecast for

Marathon FL

  • Tonight

    Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 73. East wind around 15 mph. Chance of precipitation is 50%.

    Low: 73 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers and thunderstorms. Mostly sunny, with a high near 82. Southeast wind around 10 mph. Chance of precipitation is 40%.

    High: 82 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of showers. Partly cloudy, with a low around 75. East wind around 10 mph. Chance of precipitation is 20%.

    Low: 75 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers. Sunny, with a high near 83. East wind around 5 mph. Chance of precipitation is 10%.

    High: 83 °F

    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 75. East wind around 5 mph.

    Low: 75 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 76.

    Low: 76 °F

    Mostly Clear

Detailed Forecast

Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 73. East wind around 15 mph. Chance of precipitation is 50%.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 82. Southeast wind around 10 mph. Chance of precipitation is 40%.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 75. East wind around 10 mph. Chance of precipitation is 20%.
Saturday
A slight chance of showers. Sunny, with a high near 83. East wind around 5 mph. Chance of precipitation is 10%.
Saturday Night
Mostly clear, with a low around 75. East wind around 5 mph.
Sunday
Sunny, with a high near 84.
Sunday Night
Mostly clear, with a low around 75.
Monday
Sunny, with a high near 83.
Monday Night
Mostly clear, with a low around 76.
Tuesday
Sunny, with a high near 83.
Tuesday Night
Mostly clear, with a low around 75.
Wednesday
Sunny, with a high near 82.
Wednesday Night
Mostly clear, with a low around 75.
Thursday
Sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marathon FL
 24.72°N 81.07°W (Elev. 7 ft)
Last Update:
10:15 pm EDT Apr 23, 2026
Forecast Valid:
11pm EDT Apr 23, 2026-6pm EDT Apr 30, 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