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.

Mostly Cloudy

81°F

27°C

Humidity 82%
Wind Speed SE 10 mph
Barometer 29.91 in (1012.6 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 2 May 12:53 am EDT
Extended Forecast for

Marathon Shores FL

  • Overnight

    Overnight: Mostly cloudy, with a low around 79. South wind around 10 mph.

    Low: 79 °F

    Mostly Cloudy

  • Saturday

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

    High: 87 °F

    Sunny

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 78. West wind around 5 mph becoming southwest after midnight. Chance of precipitation is 30%.

    Low: 78 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 85. Northwest wind around 5 mph. Chance of precipitation is 50%.

    High: 85 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 74. North wind 5 to 10 mph. Chance of precipitation is 70%.

    Low: 74 °F

    Showers
    Likely

  • Monday

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

    High: 83 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 75. Chance of precipitation is 30%.

    Low: 75 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84. Chance of precipitation is 10%.

    High: 84 °F

    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 77.

    Low: 77 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 79. South wind around 10 mph.
Saturday
Sunny, with a high near 87. South wind 10 to 15 mph.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 78. West wind around 5 mph becoming southwest after midnight. Chance of precipitation is 30%.
Sunday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 85. Northwest wind around 5 mph. Chance of precipitation is 50%.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 74. North wind 5 to 10 mph. Chance of precipitation is 70%.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 30%.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 75. Chance of precipitation is 30%.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84. Chance of precipitation is 10%.
Tuesday Night
Partly cloudy, with a low around 77.
Wednesday
Mostly sunny, with a high near 86.
Wednesday Night
Partly cloudy, with a low around 79.
Thursday
Mostly sunny, with a high near 86.
Thursday Night
Mostly clear, with a low around 79.
Friday
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:
1:15 am EDT May 2, 2026
Forecast Valid:
1am EDT May 2, 2026-6pm EDT May 8, 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