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 70%
Wind Speed Vrbl 3 mph
Barometer 29.89 in (1012.0 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 7 Nov 1:53 pm EST
Extended Forecast for

23 Miles NNW Long Key FL

  • This Afternoon

    This Afternoon: Sunny, with a high near 86. West wind 3 to 5 mph.

    High: 86 °F

    Sunny

  • Tonight

    Tonight: A slight chance of showers between 9pm and 11pm. Partly cloudy, with a low around 72. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 20%.

    Low: 72 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 85. Northeast wind 3 to 6 mph.

    High: 85 °F

    Mostly Sunny

  • Sunday Night

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

    Low: 72 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 84. East wind 3 to 6 mph.

    High: 84 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 72. Northeast wind around 6 mph.

    Low: 72 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 83. East wind 7 to 9 mph.

    High: 83 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 74. East wind 6 to 9 mph.

    Low: 74 °F

    Mostly Cloudy

  • Veterans Day

    Veterans Day: Mostly sunny, with a high near 81. Northeast wind around 6 mph becoming southeast in the afternoon.

    High: 81 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 86. West wind 3 to 5 mph.
Tonight
A slight chance of showers between 9pm and 11pm. Partly cloudy, with a low around 72. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 20%.
Sunday
Mostly sunny, with a high near 85. Northeast wind 3 to 6 mph.
Sunday Night
Partly cloudy, with a low around 72. Light and variable wind.
Monday
Mostly sunny, with a high near 84. East wind 3 to 6 mph.
Monday Night
Partly cloudy, with a low around 72. Northeast wind around 6 mph.
Tuesday
Mostly sunny, with a high near 83. East wind 7 to 9 mph.
Tuesday Night
Mostly cloudy, with a low around 74. East wind 6 to 9 mph.
Veterans Day
Mostly sunny, with a high near 81. Northeast wind around 6 mph becoming southeast in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 74.
Thursday
A 30 percent chance of showers. Partly sunny, with a high near 80.
Thursday Night
A 50 percent chance of showers and thunderstorms. Cloudy, with a low around 73.
Friday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 77. Breezy.
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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:
1:31 pm EST Nov 7, 2026
Forecast Valid:
2pm EST Nov 7, 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