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

80°F

27°C

Humidity 76%
Wind Speed E 9 mph
Barometer 30.03 in (1017.0 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 11 Nov 1:53 am EST
Extended Forecast for

23 Miles NNW Long Key FL

  • Overnight

    Overnight: Mostly cloudy, with a low around 74. Light east wind.

    Low: 74 °F

    Mostly Cloudy

  • Veterans Day

    Veterans Day: Mostly cloudy, then gradually becoming sunny, with a high near 84. Southeast wind 3 to 7 mph.

    High: 84 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 73. Light and variable wind.

    Low: 73 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers and thunderstorms, then a chance of showers after 2pm. Partly sunny, with a high near 83. Calm wind becoming west 5 to 8 mph in the afternoon. Chance of precipitation is 30%.

    High: 83 °F

    Mostly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 72. West wind 3 to 5 mph.

    Low: 72 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: Mostly cloudy, with a high near 81. Northwest wind 5 to 10 mph.

    High: 81 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 61. North wind around 11 mph, with gusts as high as 22 mph.

    Low: 61 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 74. North wind 9 to 13 mph, with gusts as high as 22 mph.

    High: 74 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 64. North wind around 13 mph, with gusts as high as 20 mph.

    Low: 64 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 74. Light east wind.
Veterans Day
Mostly cloudy, then gradually becoming sunny, with a high near 84. Southeast wind 3 to 7 mph.
Wednesday Night
Partly cloudy, with a low around 73. Light and variable wind.
Thursday
A slight chance of showers and thunderstorms, then a chance of showers after 2pm. Partly sunny, with a high near 83. Calm wind becoming west 5 to 8 mph in the afternoon. Chance of precipitation is 30%.
Thursday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 72. West wind 3 to 5 mph.
Friday
Mostly cloudy, with a high near 81. Northwest wind 5 to 10 mph.
Friday Night
Partly cloudy, with a low around 61. North wind around 11 mph, with gusts as high as 22 mph.
Saturday
Mostly sunny, with a high near 74. North wind 9 to 13 mph, with gusts as high as 22 mph.
Saturday Night
Mostly cloudy, with a low around 64. North wind around 13 mph, with gusts as high as 20 mph.
Sunday
Partly sunny, with a high near 78. Breezy.
Sunday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 70. Breezy.
Monday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 79. Windy.
Monday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Windy.
Tuesday
A 40 percent chance of showers. Partly sunny, with a high near 79. Breezy.
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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:
2:36 am EST Nov 11, 2026
Forecast Valid:
2am EST Nov 11, 2026-6pm EST Nov 17, 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