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

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

70°F

21°C

Humidity 82%
Wind Speed Vrbl 5 mph
Barometer 30.08 in (1018.6 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 26 Dec 4:53 am EST
Extended Forecast for

Marathon Shores FL

  • Today

    Today: Sunny, with a high near 78. Northeast wind 5 to 10 mph.

    High: 78 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 68. North wind around 5 mph.

    Low: 68 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 78. North wind around 5 mph.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 68. Northwest wind around 5 mph.

    Low: 68 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 78. Northeast wind around 5 mph.

    High: 78 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 78. Northeast wind 5 to 10 mph.
Tonight
Mostly clear, with a low around 68. North wind around 5 mph.
Saturday
Sunny, with a high near 78. North wind around 5 mph.
Saturday Night
Mostly clear, with a low around 68. Northwest wind around 5 mph.
Sunday
Sunny, with a high near 78. Northeast wind around 5 mph.
Sunday Night
Partly cloudy, with a low around 68.
Monday
Sunny, with a high near 78.
Monday Night
Mostly clear, with a low around 68.
Tuesday
Sunny, with a high near 76.
Tuesday Night
A slight chance of showers. Mostly clear, with a low around 64. Chance of precipitation is 10%.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 72. Chance of precipitation is 10%.
Wednesday Night
Partly cloudy, with a low around 60.
New Year's Day
Sunny, with a high near 72.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marathon Shores FL
 24.74°N 81.04°W (Elev. 0 ft)
Last Update:
5:15 am EST Dec 26, 2025
Forecast Valid:
5am EST Dec 26, 2025-6pm EST Jan 1, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation