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.

Partly Cloudy

75°F

24°C

Humidity 64%
Wind Speed E 16 mph
Barometer 30.16 in (1021.4 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 12 Apr 7:53 am EDT
Extended Forecast for

Marathon FL

  • Today

    Today: A slight chance of showers. Sunny, with a high near 79. Breezy, with an east wind around 20 mph. Chance of precipitation is 10%.

    High: 79 °F

    Slight Chance
    Showers and
    Breezy

  • Tonight

    Tonight: A slight chance of showers. Mostly clear, with a low around 72. Breezy, with an east wind around 20 mph. Chance of precipitation is 10%.

    Low: 72 °F

    Slight Chance
    Showers and
    Breezy

  • Monday

    Monday: A slight chance of showers. Sunny, with a high near 79. Breezy, with an east wind around 20 mph. Chance of precipitation is 10%.

    High: 79 °F

    Slight Chance
    Showers and
    Breezy

  • Monday Night

    Monday Night: A slight chance of showers. Increasing clouds, with a low around 72. Breezy, with an east wind around 20 mph. Chance of precipitation is 10%.

    Low: 72 °F

    Slight Chance
    Showers and
    Breezy

  • Tuesday

    Tuesday: A slight chance of showers. Mostly sunny, with a high near 80. East wind around 15 mph. Chance of precipitation is 10%.

    High: 80 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of showers. Partly cloudy, with a low around 72. Breezy. Chance of precipitation is 10%.

    Low: 72 °F

    Slight Chance
    Showers and
    Breezy

  • Wednesday

    Wednesday: A slight chance of showers. Mostly sunny, with a high near 80. Chance of precipitation is 10%.

    High: 80 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

Detailed Forecast

Today
A slight chance of showers. Sunny, with a high near 79. Breezy, with an east wind around 20 mph. Chance of precipitation is 10%.
Tonight
A slight chance of showers. Mostly clear, with a low around 72. Breezy, with an east wind around 20 mph. Chance of precipitation is 10%.
Monday
A slight chance of showers. Sunny, with a high near 79. Breezy, with an east wind around 20 mph. Chance of precipitation is 10%.
Monday Night
A slight chance of showers. Increasing clouds, with a low around 72. Breezy, with an east wind around 20 mph. Chance of precipitation is 10%.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 80. East wind around 15 mph. Chance of precipitation is 10%.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 72. Breezy. Chance of precipitation is 10%.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 80. Chance of precipitation is 10%.
Wednesday Night
Mostly clear, with a low around 73.
Thursday
Mostly sunny, with a high near 81.
Thursday Night
Partly cloudy, with a low around 74.
Friday
Mostly sunny, with a high near 81.
Friday Night
Mostly clear, with a low around 75.
Saturday
Sunny, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marathon FL
 24.72°N 81.07°W (Elev. 7 ft)
Last Update:
8:15 am EDT Apr 12, 2026
Forecast Valid:
8am EDT Apr 12, 2026-6pm EDT Apr 18, 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