River Flooding Continues in East Florida; Rain and Thunderstorms from the Mid-Atlantic to the Northeast Thursday; Heavy Rain in Puerto Rico

Significant river flooding is forecast along the St. John’s and the Peace rivers through the end of the week as flood waters will be slow to recede. Periods of rainfall and thunderstorms are expected across the Lower Great Lakes, Central Appalachians, Mid-Atlantic and Northeast Thursday and Friday. In Puerto Rico, increased moisture in the Atlantic will produce heavy rainfall for the island. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Light Rain

76°F

24°C

Humidity 91%
Wind Speed E 12 mph
Barometer 29.90 in (1012.5 mb)
Dewpoint 73°F (23°C)
Visibility 7.00 mi
Heat Index76°F (24°C)
Last update 4 Nov 7:53 pm EST
Extended Forecast for

Marathon FL

  • Tonight

    Tonight: A slight chance of showers and thunderstorms.  Partly cloudy, with a low around 77. Northeast wind around 10 mph.  Chance of precipitation is 20%.

    Low: 77 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: A slight chance of showers and thunderstorms.  Mostly sunny, with a high near 82. East wind around 10 mph.  Chance of precipitation is 20%.

    High: 82 °F

    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 77. Northeast wind around 10 mph.

    Low: 77 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 82. Northeast wind 5 to 10 mph.

    High: 82 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 77. Northeast wind around 5 mph.

    Low: 77 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 76.

    Low: 76 °F

    Mostly Clear

  • Sunday

    Sunday: A slight chance of showers.  Sunny, with a high near 81. 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 75. Chance of precipitation is 20%.

    Low: 75 °F

    Slight Chance
    Showers

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 77. Northeast wind around 10 mph. Chance of precipitation is 20%.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 82. East wind around 10 mph. Chance of precipitation is 20%.
Thursday Night
Mostly clear, with a low around 77. Northeast wind around 10 mph.
Friday
Sunny, with a high near 82. Northeast wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around 77. Northeast wind around 5 mph.
Saturday
Sunny, with a high near 81.
Saturday Night
Mostly clear, with a low around 76.
Sunday
A slight chance of showers. Sunny, with a high near 81. Chance of precipitation is 10%.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 75. Chance of precipitation is 20%.
Monday
A slight chance of showers. Mostly sunny, with a high near 81. Chance of precipitation is 20%.
Monday Night
A slight chance of showers. Partly cloudy, with a low around 75. Chance of precipitation is 20%.
Tuesday
A slight chance of showers. Partly sunny, with a high near 80. Chance of precipitation is 20%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 75. Chance of precipitation is 30%.
Veterans Day
A chance of showers. Partly sunny, with a high near 80. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Marathon FL
 24.72°N 81.1°W (Elev. 0 ft)
8:15 pm EST Nov 4, 2026
8pm EST Nov 4, 2026-6pm EST Nov 11, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database