Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Thunderstorm in Vicinity Rain Fog/Mist

78°F

26°C

Humidity 87%
Wind Speed SW 8 mph
Barometer 29.95 in (1014.3 mb)
Dewpoint 74°F (23°C)
Visibility 3.00 mi
Heat Index80°F (27°C)
Last update 28 Jul 8:53 am EDT
Extended Forecast for

Marathon FL

  • Today

    Today: A chance of showers and thunderstorms.  Mostly sunny, with a high near 90. West wind 5 to 10 mph.  Chance of precipitation is 40%.

    High: 90 °F

    Chance
    T-storms

  • Tonight

    Tonight: A slight chance of showers and thunderstorms.  Partly cloudy, with a low around 82. West wind around 10 mph.  Chance of precipitation is 10%.

    Low: 82 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms.  Mostly sunny, with a high near 90. Southwest wind around 10 mph.  Chance of precipitation is 10%.

    High: 90 °F

    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 82. West wind 5 to 10 mph.

    Low: 82 °F

    Mostly Clear

  • Thursday

    Thursday: A slight chance of showers and thunderstorms after 9am.  Sunny, with a high near 91. Southwest wind around 5 mph.  Chance of precipitation is 10%.

    High: 91 °F

    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 83.

    Low: 83 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of showers and thunderstorms.  Mostly sunny, with a high near 91. Chance of precipitation is 10%.

    High: 91 °F

    Slight Chance
    T-storms

  • Friday Night

    Friday Night: Partly cloudy, with a low around 84.

    Low: 84 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 90.

    High: 90 °F

    Mostly Sunny

Detailed Forecast

Today
A chance of showers and thunderstorms. Mostly sunny, with a high near 90. West wind 5 to 10 mph. Chance of precipitation is 40%.
Tonight
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 82. West wind around 10 mph. Chance of precipitation is 10%.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 90. Southwest wind around 10 mph. Chance of precipitation is 10%.
Wednesday Night
Mostly clear, with a low around 82. West wind 5 to 10 mph.
Thursday
A slight chance of showers and thunderstorms after 9am. Sunny, with a high near 91. Southwest wind around 5 mph. Chance of precipitation is 10%.
Thursday Night
Partly cloudy, with a low around 83.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 91. Chance of precipitation is 10%.
Friday Night
Partly cloudy, with a low around 84.
Saturday
Mostly sunny, with a high near 90.
Saturday Night
Partly cloudy, with a low around 84.
Sunday
Mostly sunny, with a high near 90.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 84. Chance of precipitation is 10%.
Monday
A slight chance of showers. Mostly sunny, with a high near 90. Chance of precipitation is 10%.
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ABOUT THIS FORECAST

 
Point Forecast:
Marathon FL
 24.72°N 81.1°W (Elev. 0 ft)
9:15 am EDT Jul 28, 2026
9am EDT Jul 28, 2026-6pm EDT Aug 3, 2026
 
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Additional Resources

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