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

Areas of Excessive Rainfall and Severe Thunderstorms; Typhoon Watch for Guam/CNMI

Heavy to excessive rainfall will continue today from the Texas Big Bend region into southern Oklahoma. Locally considerable flash and urban flooding is possible, and river flooding will continue in central Oklahoma. Scattered severe thunderstorms are possible in parts of the Mid-Atlantic Friday. A Typhoon Watch has been issued for Guam and CNMI. Read More >

Hazardous Weather Conditions

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

86°F

30°C

Humidity 75%
Wind Speed E 12 mph
Barometer 29.98 in (1015.0 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index97°F (36°C)
Last update 15 Oct 5:53 pm EDT
Extended Forecast for

Marathon FL

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly after 8pm. Mostly clear, with a low around 82. East wind 10 to 15 mph. Chance of precipitation is 30%.

    Low: 82 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers and thunderstorms. Mostly sunny, with a high near 88. East wind around 10 mph. Chance of precipitation is 30%.

    High: 88 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 80. East wind around 5 mph. Chance of precipitation is 50%.

    Low: 80 °F

    Chance
    Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 86. Northeast wind around 5 mph. Chance of precipitation is 50%.

    High: 86 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 77. North wind around 15 mph. Chance of precipitation is 80%.

    Low: 77 °F

    Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 85. Breezy. Chance of precipitation is 90%.

    High: 85 °F

    Showers and
    Breezy

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 76. Windy. Chance of precipitation is 60%.

    Low: 76 °F

    Showers
    Likely and
    Windy

  • Monday

    Monday: Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 85. Windy. Chance of precipitation is 60%.

    High: 85 °F

    Showers
    Likely and
    Windy

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 76. Windy. Chance of precipitation is 40%.

    Low: 76 °F

    Chance
    T-storms and
    Windy

Detailed Forecast

Tonight
A chance of showers and thunderstorms, mainly after 8pm. Mostly clear, with a low around 82. East wind 10 to 15 mph. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. East wind around 10 mph. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 80. East wind around 5 mph. Chance of precipitation is 50%.
Saturday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 86. Northeast wind around 5 mph. Chance of precipitation is 50%.
Saturday Night
Showers and possibly a thunderstorm. Low around 77. North wind around 15 mph. Chance of precipitation is 80%.
Sunday
Showers and possibly a thunderstorm. High near 85. Breezy. Chance of precipitation is 90%.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 76. Windy. Chance of precipitation is 60%.
Monday
Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 85. Windy. Chance of precipitation is 60%.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 76. Windy. Chance of precipitation is 40%.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 85. Breezy. Chance of precipitation is 50%.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 76. Breezy. Chance of precipitation is 30%.
Wednesday
A chance of showers. Sunny, with a high near 85. Breezy. Chance of precipitation is 40%.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 75. Chance of precipitation is 30%.
Thursday
A chance of showers and thunderstorms. Sunny, with a high near 84. 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:
6:15 pm EDT Oct 15, 2026
Forecast Valid:
6pm EDT Oct 15, 2026-6pm EDT Oct 22, 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