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

82°F

28°C

Humidity 65%
Wind Speed SE 8 mph
Barometer 29.98 in (1015.1 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 29 Apr 2:53 pm EDT
Extended Forecast for

Marathon Shores FL

  • This Afternoon

    This Afternoon: A slight chance of showers. Sunny, with a high near 84. Southeast wind around 5 mph. Chance of precipitation is 10%.

    High: 84 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: A slight chance of showers before 8pm. Mostly clear, with a low around 76. Southeast wind around 5 mph. Chance of precipitation is 10%.

    Low: 76 °F

    Slight Chance
    Showers then
    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 85. South wind around 5 mph.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 76. Southeast wind around 5 mph.

    Low: 76 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 85. Southeast wind 5 to 10 mph.

    High: 85 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 78.

    Low: 78 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers. Partly cloudy, with a low around 77. Chance of precipitation is 10%.

    Low: 77 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: A chance of showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 30%.

    High: 85 °F

    Chance
    T-storms

Detailed Forecast

This Afternoon
A slight chance of showers. Sunny, with a high near 84. Southeast wind around 5 mph. Chance of precipitation is 10%.
Tonight
A slight chance of showers before 8pm. Mostly clear, with a low around 76. Southeast wind around 5 mph. Chance of precipitation is 10%.
Thursday
Sunny, with a high near 85. South wind around 5 mph.
Thursday Night
Mostly clear, with a low around 76. Southeast wind around 5 mph.
Friday
Sunny, with a high near 85. Southeast wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around 78.
Saturday
Sunny, with a high near 86.
Saturday Night
A slight chance of showers. Partly cloudy, with a low around 77. Chance of precipitation is 10%.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 30%.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 75. Chance of precipitation is 60%.
Monday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 83. Chance of precipitation is 30%.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 75. Chance of precipitation is 30%.
Tuesday
Partly sunny, with a high near 83.
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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:
3:21 pm EDT Apr 29, 2026
Forecast Valid:
3pm EDT Apr 29, 2026-6pm EDT May 5, 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