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

78°F

26°C

Humidity 85%
Wind Speed E 6 mph
Barometer 29.89 in (1012.0 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 6 Nov 12:53 am EST
Extended Forecast for

23 Miles NNW Long Key FL

  • Overnight

    Overnight: Mostly clear, with a low around 72. Light northeast wind.

    Low: 72 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 85. Northeast wind 3 to 5 mph.

    High: 85 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 72. Light and variable wind.

    Low: 72 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 85. Calm wind becoming west around 5 mph in the afternoon.

    High: 85 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 72. Calm wind becoming northeast around 5 mph after midnight.

    Low: 72 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 84. Northeast wind 3 to 7 mph.

    High: 84 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 72. Northeast wind around 6 mph.

    Low: 72 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 84. Northeast wind 8 to 10 mph.

    High: 84 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 73. Northeast wind 10 to 14 mph.

    Low: 73 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 72. Light northeast wind.
Friday
Sunny, with a high near 85. Northeast wind 3 to 5 mph.
Friday Night
Partly cloudy, with a low around 72. Light and variable wind.
Saturday
Sunny, with a high near 85. Calm wind becoming west around 5 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 72. Calm wind becoming northeast around 5 mph after midnight.
Sunday
Mostly sunny, with a high near 84. Northeast wind 3 to 7 mph.
Sunday Night
Mostly cloudy, with a low around 72. Northeast wind around 6 mph.
Monday
Mostly sunny, with a high near 84. Northeast wind 8 to 10 mph.
Monday Night
Partly cloudy, with a low around 73. Northeast wind 10 to 14 mph.
Tuesday
A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 81.
Tuesday Night
Mostly cloudy, with a low around 73.
Veterans Day
A 20 percent chance of showers. Mostly sunny, with a high near 80.
Wednesday Night
Partly cloudy, with a low around 73.
Thursday
A 30 percent chance of showers. Partly sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
23 Miles NNW Long Key FL
 25.14°N 80.92°W
Last Update:
1:31 am EST Nov 6, 2026
Forecast Valid:
1am EST Nov 6, 2026-6pm EST Nov 12, 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