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.

86°F

30°C

Humidity 75%
Wind Speed E 10 mph
Barometer 30.14 in (1020.6 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index97°F (36°C)
Last update 22 Jun 10:53 pm EDT
Extended Forecast for

Marathon Shores FL

  • Tonight

    Tonight: Partly cloudy, with a low around 84. Southeast wind around 10 mph.

    Low: 84 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 89. Southeast wind 5 to 10 mph.

    High: 89 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 83. East wind around 5 mph.

    Low: 83 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms. Sunny, with a high near 89. East wind around 5 mph. Chance of precipitation is 10%.

    High: 89 °F

    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms. Mostly clear, with a low around 83. East wind around 5 mph. Chance of precipitation is 10%.

    Low: 83 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 83.

    Low: 83 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 83.

    Low: 83 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 84. Southeast wind around 10 mph.
Tuesday
Mostly sunny, with a high near 89. Southeast wind 5 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 83. East wind around 5 mph.
Wednesday
A slight chance of showers and thunderstorms. Sunny, with a high near 89. East wind around 5 mph. Chance of precipitation is 10%.
Wednesday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 83. East wind around 5 mph. Chance of precipitation is 10%.
Thursday
Sunny, with a high near 89.
Thursday Night
Mostly clear, with a low around 83.
Friday
Sunny, with a high near 89.
Friday Night
Mostly clear, with a low around 83.
Saturday
Sunny, with a high near 89.
Saturday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 83. Chance of precipitation is 20%.
Sunday
A slight chance of showers and thunderstorms. Sunny, with a high near 89. Chance of precipitation is 20%.
Sunday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 83. Chance of precipitation is 20%.
Monday
A slight chance of showers. Sunny, with a high near 89. 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:
11:15 pm EDT Jun 22, 2026
Forecast Valid:
11pm EDT Jun 22, 2026-6pm EDT Jun 29, 2026
 
Forecast Discussion
 
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Additional Resources

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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