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

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

A Few Clouds

83°F

28°C

Humidity 77%
Wind Speed SE 10 mph
Barometer 30.09 in (1019.0 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 14 Jun 6:53 am EDT
Extended Forecast for

27 Miles NW Long Key FL

  • Today

    Today: A 50 percent chance of showers and thunderstorms, mainly after noon. Sunny, with a high near 85. Southeast wind around 15 mph, with gusts as high as 21 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 85 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 5am. Mostly clear, with a low around 81. East wind around 13 mph.

    Low: 81 °F

    Chance
    T-storms

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms, mainly after 7am. Sunny, with a high near 85. Southeast wind 13 to 15 mph, with gusts as high as 20 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 85 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 81. East wind around 13 mph.

    Low: 81 °F

    Chance
    T-storms

  • Monday

    Monday: A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 11am, then a chance of showers and thunderstorms after 11am. Sunny, with a high near 85. Southeast wind 13 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.

    High: 85 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 81. East wind 11 to 14 mph.

    Low: 81 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85. Southeast wind 13 to 15 mph, with gusts as high as 22 mph.

    High: 85 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 2am, then a slight chance of showers. Partly cloudy, with a low around 81. East wind around 14 mph. Chance of precipitation is 30%.

    Low: 81 °F

    Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 8am. Mostly sunny, with a high near 85. Breezy, with a southeast wind 14 to 17 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.

    High: 85 °F

    Chance
    Showers then
    Chance
    T-storms and
    Breezy

Detailed Forecast

Today
A 50 percent chance of showers and thunderstorms, mainly after noon. Sunny, with a high near 85. Southeast wind around 15 mph, with gusts as high as 21 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A 30 percent chance of showers and thunderstorms, mainly after 5am. Mostly clear, with a low around 81. East wind around 13 mph.
Sunday
A 50 percent chance of showers and thunderstorms, mainly after 7am. Sunny, with a high near 85. Southeast wind 13 to 15 mph, with gusts as high as 20 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 81. East wind around 13 mph.
Monday
A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 11am, then a chance of showers and thunderstorms after 11am. Sunny, with a high near 85. Southeast wind 13 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 81. East wind 11 to 14 mph.
Tuesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85. Southeast wind 13 to 15 mph, with gusts as high as 22 mph.
Tuesday Night
A chance of showers and thunderstorms before 2am, then a slight chance of showers. Partly cloudy, with a low around 81. East wind around 14 mph. Chance of precipitation is 30%.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 8am. Mostly sunny, with a high near 85. Breezy, with a southeast wind 14 to 17 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Wednesday Night
A 30 percent chance of showers and thunderstorms, mainly before 2am. Partly cloudy, with a low around 81.
Juneteenth
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85. Breezy.
Thursday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 81.
Friday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
27 Miles NW Long Key FL
 25.13°N 81.08°W
Last Update:
1:32 am EDT Jun 14, 2025
Forecast Valid:
7am EDT Jun 14, 2025-6pm EDT Jun 20, 2025
 
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Additional Resources

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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