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

77°F

25°C

Humidity 77%
Wind Speed SE 3 mph
Barometer 29.90 in (1012.5 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 30 Apr 5:53 am EDT
Extended Forecast for

Marathon Shores FL

  • Today

    Today: Sunny, with a high near 84. South wind around 5 mph.

    High: 84 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 76. Northwest wind around 5 mph becoming south after midnight.

    Low: 76 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 86. Southeast wind around 5 mph.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 79. East wind 5 to 10 mph.

    Low: 79 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 87. South wind 10 to 15 mph.

    High: 87 °F

    Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 77. Chance of precipitation is 20%.

    Low: 77 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 85. Chance of precipitation is 40%.

    High: 85 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 75. Chance of precipitation is 50%.

    Low: 75 °F

    Chance
    T-storms

  • Monday

    Monday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 83. Chance of precipitation is 30%.

    High: 83 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 84. South wind around 5 mph.
Tonight
Mostly clear, with a low around 76. Northwest wind around 5 mph becoming south after midnight.
Friday
Sunny, with a high near 86. Southeast wind around 5 mph.
Friday Night
Mostly clear, with a low around 79. East wind 5 to 10 mph.
Saturday
Sunny, with a high near 87. South wind 10 to 15 mph.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 77. Chance of precipitation is 20%.
Sunday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 85. Chance of precipitation is 40%.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 75. Chance of precipitation is 50%.
Monday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 83. Chance of precipitation is 30%.
Monday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 75. Chance of precipitation is 20%.
Tuesday
Partly sunny, with a high near 84.
Tuesday Night
Mostly cloudy, with a low around 77.
Wednesday
Mostly sunny, with a high near 86.
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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:
6:15 am EDT Apr 30, 2026
Forecast Valid:
6am EDT Apr 30, 2026-6pm EDT May 6, 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