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.

Fair

84°F

29°C

Humidity 65%
Wind Speed Vrbl 7 mph
Barometer 29.90 in (1012.4 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index89°F (32°C)
Last update 7 Nov 12:53 pm EST
Extended Forecast for

26 Miles NNW Long Key FL

  • This Afternoon

    This Afternoon: Sunny, with a high near 83. Calm wind becoming north around 5 mph.

    High: 83 °F

    Sunny

  • Tonight

    Tonight: A 20 percent chance of showers before 10pm. Partly cloudy, with a low around 74. North wind 3 to 6 mph.

    Low: 74 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 82. North wind 5 to 8 mph becoming light and variable in the afternoon.

    High: 82 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 73. Northeast wind 5 to 7 mph.

    Low: 73 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 82. East wind 6 to 9 mph.

    High: 82 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 73. Northeast wind around 10 mph.

    Low: 73 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 81. East wind 9 to 11 mph.

    High: 81 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 73. Northeast wind 6 to 10 mph.

    Low: 73 °F

    Mostly Cloudy

  • Veterans Day

    Veterans Day: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 81. Northeast wind around 6 mph becoming southeast in the afternoon.

    High: 81 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

This Afternoon
Sunny, with a high near 83. Calm wind becoming north around 5 mph.
Tonight
A 20 percent chance of showers before 10pm. Partly cloudy, with a low around 74. North wind 3 to 6 mph.
Sunday
Mostly sunny, with a high near 82. North wind 5 to 8 mph becoming light and variable in the afternoon.
Sunday Night
Mostly cloudy, with a low around 73. Northeast wind 5 to 7 mph.
Monday
Mostly sunny, with a high near 82. East wind 6 to 9 mph.
Monday Night
Partly cloudy, with a low around 73. Northeast wind around 10 mph.
Tuesday
Mostly sunny, with a high near 81. East wind 9 to 11 mph.
Tuesday Night
Mostly cloudy, with a low around 73. Northeast wind 6 to 10 mph.
Veterans Day
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 81. Northeast wind around 6 mph becoming southeast in the afternoon.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73.
Thursday
A 30 percent chance of showers. Partly sunny, with a high near 79.
Thursday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 72.
Friday
A 50 percent chance of showers. Mostly cloudy, with a high near 76.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
26 Miles NNW Long Key FL
 25.17°N 80.94°W
Last Update:
3:47 am EST Nov 7, 2026
Forecast Valid:
1pm EST Nov 7, 2026-6pm EST Nov 13, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation