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.

Overcast

73°F

23°C

Humidity 76%
Wind Speed E 10 G 22 mph
Barometer 30.11 in (1019.4 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 11 Apr 5:53 am EDT
Extended Forecast for

Marathon FL

  • Today

    Today: A chance of showers before 8am. Sunny, with a high near 80. Northeast wind around 15 mph. Chance of precipitation is 30%.

    High: 80 °F

    Chance
    Showers then
    Sunny

  • Tonight

    Tonight: A slight chance of showers. Mostly clear, with a low around 72. East wind around 15 mph. Chance of precipitation is 10%.

    Low: 72 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers. Sunny, with a high near 81. East wind around 15 mph. Chance of precipitation is 10%.

    High: 81 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: A slight chance of showers. Partly cloudy, with a low around 73. Breezy, with an east wind 15 to 20 mph. Chance of precipitation is 10%.

    Low: 73 °F

    Slight Chance
    Showers and
    Breezy

  • Monday

    Monday: A slight chance of showers. Sunny, with a high near 81. East wind around 15 mph. Chance of precipitation is 10%.

    High: 81 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of showers. Mostly cloudy, with a low around 73. Chance of precipitation is 10%.

    Low: 73 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers. Partly sunny, with a high near 81. Chance of precipitation is 10%.

    High: 81 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 73. Breezy.

    Low: 73 °F

    Partly Cloudy
    and Breezy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

Detailed Forecast

Today
A chance of showers before 8am. Sunny, with a high near 80. Northeast wind around 15 mph. Chance of precipitation is 30%.
Tonight
A slight chance of showers. Mostly clear, with a low around 72. East wind around 15 mph. Chance of precipitation is 10%.
Sunday
A slight chance of showers. Sunny, with a high near 81. East wind around 15 mph. Chance of precipitation is 10%.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 73. Breezy, with an east wind 15 to 20 mph. Chance of precipitation is 10%.
Monday
A slight chance of showers. Sunny, with a high near 81. East wind around 15 mph. Chance of precipitation is 10%.
Monday Night
A slight chance of showers. Mostly cloudy, with a low around 73. Chance of precipitation is 10%.
Tuesday
A slight chance of showers. Partly sunny, with a high near 81. Chance of precipitation is 10%.
Tuesday Night
Partly cloudy, with a low around 73. Breezy.
Wednesday
Mostly sunny, with a high near 80.
Wednesday Night
Mostly clear, with a low around 73.
Thursday
Mostly sunny, with a high near 81.
Thursday Night
Mostly clear, with a low around 74.
Friday
Sunny, with a high near 81.
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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:
6:15 am EDT Apr 11, 2026
Forecast Valid:
6am EDT Apr 11, 2026-6pm EDT Apr 17, 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