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

79°F

26°C

Humidity 82%
Wind Speed Vrbl 3 mph
Barometer 29.91 in (1012.7 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 6 Nov 8:53 pm EST
Extended Forecast for

23 Miles NNW Long Key FL

  • Tonight

    Tonight: Mostly clear, with a low around 72. Calm wind.

    Low: 72 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 86. Calm wind becoming west around 5 mph in the afternoon.

    High: 86 °F

    Sunny

  • Saturday Night

    Saturday Night: A 50 percent chance of showers, mainly before 11pm. Partly cloudy, with a low around 72. Light northeast wind. New precipitation amounts of less than a tenth of an inch possible.

    Low: 72 °F

    Chance
    Showers then
    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 85. Northeast wind 3 to 7 mph.

    High: 85 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 72. Northeast wind 3 to 5 mph.

    Low: 72 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 84. East wind 6 to 8 mph.

    High: 84 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 73. Northeast wind 9 to 11 mph.

    Low: 73 °F

    Mostly Cloudy

  • Tuesday

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

    High: 81 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 74. East wind 6 to 10 mph.

    Low: 74 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 72. Calm wind.
Saturday
Sunny, with a high near 86. Calm wind becoming west around 5 mph in the afternoon.
Saturday Night
A 50 percent chance of showers, mainly before 11pm. Partly cloudy, with a low around 72. Light northeast wind. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Mostly sunny, with a high near 85. Northeast wind 3 to 7 mph.
Sunday Night
Mostly cloudy, with a low around 72. Northeast wind 3 to 5 mph.
Monday
Partly sunny, with a high near 84. East wind 6 to 8 mph.
Monday Night
Mostly cloudy, with a low around 73. Northeast wind 9 to 11 mph.
Tuesday
Mostly sunny, with a high near 81. East wind around 11 mph.
Tuesday Night
Mostly cloudy, with a low around 74. East wind 6 to 10 mph.
Veterans Day
A 20 percent chance of showers after 1pm. Partly sunny, with a high near 81.
Wednesday Night
Mostly cloudy, with a low around 73.
Thursday
A 20 percent chance of showers. Partly sunny, with a high near 79.
Thursday Night
A 40 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:
23 Miles NNW Long Key FL
 25.14°N 80.95°W
Last Update:
3:36 pm EST Nov 6, 2026
Forecast Valid:
9pm EST Nov 6, 2026-6pm EST Nov 13, 2026
 
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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