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

Severe Thunderstorms and Heavy Rainfall; Typhoon Watch in Guam and CNMI

Heavy to excessive rainfall will continue through tonight from the Texas Big Bend region into southern Oklahoma. Scattered damaging wind gusts and a few tornadoes may accompany a line of severe thunderstorms that is expected across the Mid-Atlantic into New England Friday. A Typhoon Watch continues for Guam and CNMI as Tropical Storm Champi will strengthen and approach the islands this weekend. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

85°F

29°C

Humidity 77%
Wind Speed E 12 mph
Barometer 30.01 in (1016.2 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index96°F (36°C)
Last update 15 Oct 8:53 pm EDT
Extended Forecast for

Long Key FL

  • Tonight

    Tonight: A chance of showers and thunderstorms. Partly cloudy, with a low around 82. East wind around 10 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 86. East wind 5 to 10 mph. Chance of precipitation is 30%.

    High: 86 °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. Partly sunny, with a high near 85. Northeast wind around 5 mph. Chance of precipitation is 50%.

    High: 85 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 78. North wind around 15 mph. Chance of precipitation is 80%.

    Low: 78 °F

    Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 83. Breezy. Chance of precipitation is 80%.

    High: 83 °F

    Showers and
    Breezy

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 77. Very windy. Chance of precipitation is 60%.

    Low: 77 °F

    Showers
    Likely and
    Very Windy

  • Monday

    Monday: Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 84. Windy. Chance of precipitation is 60%.

    High: 84 °F

    Showers
    Likely and
    Windy

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 77. Windy. Chance of precipitation is 40%.

    Low: 77 °F

    Chance
    T-storms and
    Windy

Detailed Forecast

Tonight
A chance of showers and thunderstorms. Partly cloudy, with a low around 82. East wind around 10 mph. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 86. East wind 5 to 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. Partly sunny, with a high near 85. Northeast wind around 5 mph. Chance of precipitation is 50%.
Saturday Night
Showers and possibly a thunderstorm. Low around 78. North wind around 15 mph. Chance of precipitation is 80%.
Sunday
Showers and possibly a thunderstorm. High near 83. Breezy. Chance of precipitation is 80%.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 77. Very windy. Chance of precipitation is 60%.
Monday
Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 84. Windy. Chance of precipitation is 60%.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 77. Windy. Chance of precipitation is 40%.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 84. Windy. Chance of precipitation is 50%.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 76. Windy. Chance of precipitation is 30%.
Wednesday
A chance of showers. Sunny, with a high near 83. Windy. Chance of precipitation is 40%.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 76. Windy. Chance of precipitation is 30%.
Thursday
A chance of showers and thunderstorms. Sunny, with a high near 83. Breezy. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Long Key FL
 24.83°N 80.81°W (Elev. 0 ft)
Last Update:
9:15 pm EDT Oct 15, 2026
Forecast Valid:
9pm 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