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

74°F

23°C

Humidity 57%
Wind Speed NE 20 G 30 mph
Barometer 30.14 in (1020.6 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 21 Apr 8:53 pm EDT
Extended Forecast for

Marathon Shores FL

  • Tonight

    Tonight: Partly cloudy, with a low around 72. Breezy, with an east wind around 20 mph, with gusts as high as 30 mph.

    Low: 72 °F

    Partly Cloudy
    and Breezy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 80. Breezy, with an east wind 15 to 20 mph.

    High: 80 °F

    Mostly Sunny
    and Breezy
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of showers. Mostly cloudy, with a low around 72. East wind around 15 mph. Chance of precipitation is 20%.

    Low: 72 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: A chance of showers. Mostly cloudy, with a high near 81. East wind around 15 mph. Chance of precipitation is 30%.

    High: 81 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. East wind 10 to 15 mph. Chance of precipitation is 40%.

    Low: 72 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers and thunderstorms. Mostly sunny, with a high near 82. Chance of precipitation is 40%.

    High: 82 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of showers. Partly cloudy, with a low around 74. Chance of precipitation is 10%.

    Low: 74 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 72. Breezy, with an east wind around 20 mph, with gusts as high as 30 mph.
Wednesday
Mostly sunny, with a high near 80. Breezy, with an east wind 15 to 20 mph.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 72. East wind around 15 mph. Chance of precipitation is 20%.
Thursday
A chance of showers. Mostly cloudy, with a high near 81. East wind around 15 mph. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. East wind 10 to 15 mph. Chance of precipitation is 40%.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 82. Chance of precipitation is 40%.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 74. Chance of precipitation is 10%.
Saturday
Sunny, with a high near 83.
Saturday Night
Mostly clear, with a low around 75.
Sunday
Sunny, with a high near 84.
Sunday Night
Mostly clear, with a low around 75.
Monday
Sunny, with a high near 84.
Monday Night
Mostly clear, with a low around 76.
Tuesday
Sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marathon Shores FL
 24.72°N 81.05°W (Elev. 0 ft)
Last Update:
8:15 pm EDT Apr 21, 2026
Forecast Valid:
9pm EDT Apr 21, 2026-6pm EDT Apr 28, 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