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

Tracking Areas of Fire Weather, Winter Weather, and Severe Weather Thursday

Continuation of gusty winds and low relative humidity will additional periods of critical fire weather to the southern Plains Thursday and Friday. Another Pacific storm will continue gusty winds and heavy snow over the western mountains into Thursday. Severe thunderstorms are possible across parts of the middle Mississippi into lower Ohio Valleys Thursday afternoon into early evening. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

74°F

23°C

Humidity 79%
Wind Speed E 9 mph
Barometer 30.04 in (1017.2 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 18 Feb 8:53 pm EST
Extended Forecast for

Marathon FL

  • Tonight

    Tonight: Partly cloudy, with a low around 72. Southeast wind 5 to 10 mph.

    Low: 72 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 82. Southeast wind 5 to 10 mph.

    High: 82 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 72. Southeast wind around 10 mph.

    Low: 72 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 83. Southeast wind 5 to 10 mph.

    High: 83 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 73. Southeast wind 5 to 10 mph.

    Low: 73 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 71.

    Low: 71 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers. Partly cloudy, with a low around 61. Windy. Chance of precipitation is 10%.

    Low: 61 °F

    Slight Chance
    Showers and
    Windy

Detailed Forecast

Tonight
Partly cloudy, with a low around 72. Southeast wind 5 to 10 mph.
Thursday
Sunny, with a high near 82. Southeast wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 72. Southeast wind around 10 mph.
Friday
Sunny, with a high near 83. Southeast wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around 73. Southeast wind 5 to 10 mph.
Saturday
Sunny, with a high near 83.
Saturday Night
Mostly clear, with a low around 71.
Sunday
Sunny, with a high near 81.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 61. Windy. Chance of precipitation is 10%.
Monday
Mostly sunny, with a high near 67. Breezy.
Monday Night
Mostly clear, with a low around 54.
Tuesday
Sunny, with a high near 67.
Tuesday Night
Mostly clear, with a low around 59.
Wednesday
Mostly sunny, with a high near 74.
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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:
8:15 pm EST Feb 18, 2026
Forecast Valid:
9pm EST Feb 18, 2026-6pm EST Feb 25, 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