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 88%
Wind Speed Vrbl 5 mph
Barometer 29.94 in (1013.7 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 4 May 7:53 am EDT
Extended Forecast for

Marathon Shores FL

  • Today

    Today: Showers likely and possibly a thunderstorm before 8am, then a chance of showers and thunderstorms after 8am. Mostly sunny, with a high near 84. North wind 5 to 10 mph. Chance of precipitation is 60%.

    High: 84 °F

    Showers
    Likely

  • Tonight

    Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 76. East wind 5 to 10 mph. Chance of precipitation is 40%.

    Low: 76 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 85. East wind around 5 mph becoming south in the afternoon. Chance of precipitation is 10%.

    High: 85 °F

    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A slight chance of showers. Partly cloudy, with a low around 78. North wind around 5 mph becoming east after midnight. Chance of precipitation is 10%.

    Low: 78 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 87. Southeast wind around 5 mph.

    High: 87 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 80.

    Low: 80 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 79.

    Low: 79 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

Detailed Forecast

Today
Showers likely and possibly a thunderstorm before 8am, then a chance of showers and thunderstorms after 8am. Mostly sunny, with a high near 84. North wind 5 to 10 mph. Chance of precipitation is 60%.
Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 76. East wind 5 to 10 mph. Chance of precipitation is 40%.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 85. East wind around 5 mph becoming south in the afternoon. Chance of precipitation is 10%.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 78. North wind around 5 mph becoming east after midnight. Chance of precipitation is 10%.
Wednesday
Mostly sunny, with a high near 87. Southeast wind around 5 mph.
Wednesday Night
Mostly clear, with a low around 80.
Thursday
Sunny, with a high near 87.
Thursday Night
Mostly clear, with a low around 79.
Friday
Mostly sunny, with a high near 86.
Friday Night
Partly cloudy, with a low around 79.
Saturday
Mostly sunny, with a high near 87.
Saturday Night
A slight chance of showers. Partly cloudy, with a low around 79. Chance of precipitation is 10%.
Sunday
A slight chance of showers. Mostly sunny, with a high near 86. Chance of precipitation is 10%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marathon Shores FL
 24.72°N 81.05°W (Elev. 0 ft)
Last Update:
7:15 am EDT May 4, 2026
Forecast Valid:
7am EDT May 4, 2026-6pm EDT May 10, 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