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Flooding Risks from Tropical Moisture Across the Southeast and Southwest

Tropical moisture from Isaias and Rachel will impact portions of the Southeast and Southwest this weekend. Flash flooding, strong winds and even a threat for severe thunderstorms and tornadoes are possible. Meanwhile, strong winds and dry fuels are raising fire weather concerns across the central Great Basin and western High Plains. Across the northern Rockies, first winter storm of the season. Read More >

Hazardous Weather Conditions

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

85°F

29°C

Humidity 80%
Wind Speed E 10 mph
Barometer 29.98 in (1015.1 mb)
Dewpoint 78°F (26°C)
Visibility 10.00 mi
Heat Index97°F (36°C)
Last update 10 Oct 7:53 pm EDT
Extended Forecast for

Marathon FL

  • Tonight

    Tonight: A chance of showers and thunderstorms. Partly cloudy, with a low around 81. Southeast wind around 10 mph. Chance of precipitation is 50%.

    Low: 81 °F

    Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 88. Southeast wind 5 to 10 mph. Chance of precipitation is 10%.

    High: 88 °F

    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 80. East wind 5 to 10 mph. Chance of precipitation is 10%.

    Low: 80 °F

    Slight Chance
    T-storms

  • Columbus Day

    Columbus Day: A slight chance of showers and thunderstorms. Sunny, with a high near 88. Northeast wind around 5 mph. Chance of precipitation is 10%.

    High: 88 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 78. Northeast wind around 10 mph. Chance of precipitation is 30%.

    Low: 78 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms. Sunny, with a high near 86. Chance of precipitation is 10%.

    High: 86 °F

    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 78.

    Low: 78 °F

    Mostly Clear

  • Wednesday

    Wednesday: A slight chance of showers. Sunny, with a high near 86. Chance of precipitation is 10%.

    High: 86 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly clear, with a low around 79. Chance of precipitation is 30%.

    Low: 79 °F

    Chance
    Showers

Detailed Forecast

Tonight
A chance of showers and thunderstorms. Partly cloudy, with a low around 81. Southeast wind around 10 mph. Chance of precipitation is 50%.
Sunday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 88. Southeast wind 5 to 10 mph. Chance of precipitation is 10%.
Sunday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 80. East wind 5 to 10 mph. Chance of precipitation is 10%.
Columbus Day
A slight chance of showers and thunderstorms. Sunny, with a high near 88. Northeast wind around 5 mph. Chance of precipitation is 10%.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 78. Northeast wind around 10 mph. Chance of precipitation is 30%.
Tuesday
A slight chance of showers and thunderstorms. Sunny, with a high near 86. Chance of precipitation is 10%.
Tuesday Night
Mostly clear, with a low around 78.
Wednesday
A slight chance of showers. Sunny, with a high near 86. Chance of precipitation is 10%.
Wednesday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 79. Chance of precipitation is 30%.
Thursday
A chance of showers and thunderstorms. Sunny, with a high near 87. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 79. Chance of precipitation is 40%.
Friday
A chance of showers and thunderstorms. Sunny, with a high near 87. Chance of precipitation is 30%.
Friday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 78. Chance of precipitation is 20%.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 86. Chance of precipitation is 40%.
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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:
7:15 pm EDT Oct 10, 2026
Forecast Valid:
8pm EDT Oct 10, 2026-6pm EDT Oct 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