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

Atmospheric River to Impact the Northwest; Windy Conditions in the Northeast

A strong atmospheric river moving into northern California later today will bring a threat for moderate to heavy rainfall and flooding, gusty to high winds, and mountain snows for parts of the Northwest U.S. through Wednesday. Gusty winds and isolated showers are expected today in the Northeast U.S. behind a cold front. Wind Advisories have been issued. 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 88%
Wind Speed NE 9 G 22 mph
Barometer 30.20 in (1022.6 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 4 Nov 9:53 am EST
Extended Forecast for

Marathon FL

  • Today

    Today: Mostly cloudy, with a high near 80. Northeast wind around 15 mph.

    High: 80 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 74. Northeast wind around 15 mph.

    Low: 74 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 82. East wind around 15 mph.

    High: 82 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 74. East wind 10 to 15 mph.

    Low: 74 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 82. East wind around 10 mph.

    High: 82 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A slight chance of showers. Mostly cloudy, with a low around 75. Chance of precipitation is 20%.

    Low: 75 °F

    Slight Chance
    Showers

  • Friday

    Friday: A slight chance of showers. Partly sunny, with a high near 83. Chance of precipitation is 20%.

    High: 83 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of showers. Partly cloudy, with a low around 76. Chance of precipitation is 20%.

    Low: 76 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers. Sunny, with a high near 85. Chance of precipitation is 20%.

    High: 85 °F

    Slight Chance
    Showers

Detailed Forecast

Today
Mostly cloudy, with a high near 80. Northeast wind around 15 mph.
Tonight
Mostly cloudy, with a low around 74. Northeast wind around 15 mph.
Wednesday
Mostly cloudy, with a high near 82. East wind around 15 mph.
Wednesday Night
Mostly cloudy, with a low around 74. East wind 10 to 15 mph.
Thursday
Mostly cloudy, with a high near 82. East wind around 10 mph.
Thursday Night
A slight chance of showers. Mostly cloudy, with a low around 75. Chance of precipitation is 20%.
Friday
A slight chance of showers. Partly sunny, with a high near 83. Chance of precipitation is 20%.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 76. Chance of precipitation is 20%.
Saturday
A slight chance of showers. Sunny, with a high near 85. Chance of precipitation is 20%.
Saturday Night
A slight chance of showers. Mostly clear, with a low around 76. Chance of precipitation is 20%.
Sunday
A slight chance of showers. Sunny, with a high near 84. Chance of precipitation is 10%.
Sunday Night
A slight chance of showers. Mostly clear, with a low around 75. Chance of precipitation is 20%.
Monday
A slight chance of showers. Mostly sunny, with a high near 83. Chance of precipitation is 20%.
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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:
10:15 am EST Nov 4, 2025
Forecast Valid:
10am EST Nov 4, 2025-6pm EST Nov 10, 2025
 
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