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

85°F

29°C

Humidity 63%
Wind Speed W 9 G 17 mph
Barometer 29.90 in (1012.3 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 14 May 4:53 pm EDT
Extended Forecast for

5 Miles W Marathon FL

  • This Afternoon

    This Afternoon: A slight chance of showers. Sunny, with a high near 86. West wind around 15 mph. Chance of precipitation is 20%.

    High: 86 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: A slight chance of showers before 8pm. Mostly clear, with a low around 79. West wind around 15 mph. Chance of precipitation is 10%.

    Low: 79 °F

    Slight Chance
    Showers then
    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 86. Northwest wind 5 to 10 mph becoming west in the afternoon.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms. Mostly clear, with a low around 81. West wind around 5 mph becoming calm. Chance of precipitation is 20%.

    Low: 81 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: A slight chance of showers and thunderstorms. Sunny, with a high near 87. East wind 10 to 15 mph. Chance of precipitation is 10%.

    High: 87 °F

    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 82. Breezy. Chance of precipitation is 30%.

    Low: 82 °F

    Chance
    Showers and
    Breezy

  • Sunday

    Sunday: A chance of showers and thunderstorms. Mostly sunny, with a high near 86. Breezy. Chance of precipitation is 30%.

    High: 86 °F

    Chance
    Showers and
    Breezy

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 81. Chance of precipitation is 40%.

    Low: 81 °F

    Chance
    T-storms

  • Monday

    Monday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 86. Breezy. Chance of precipitation is 20%.

    High: 86 °F

    Slight Chance
    T-storms and
    Breezy

Detailed Forecast

This Afternoon
A slight chance of showers. Sunny, with a high near 86. West wind around 15 mph. Chance of precipitation is 20%.
Tonight
A slight chance of showers before 8pm. Mostly clear, with a low around 79. West wind around 15 mph. Chance of precipitation is 10%.
Friday
Sunny, with a high near 86. Northwest wind 5 to 10 mph becoming west in the afternoon.
Friday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 81. West wind around 5 mph becoming calm. Chance of precipitation is 20%.
Saturday
A slight chance of showers and thunderstorms. Sunny, with a high near 87. East wind 10 to 15 mph. Chance of precipitation is 10%.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 82. Breezy. Chance of precipitation is 30%.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 86. Breezy. Chance of precipitation is 30%.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 81. Chance of precipitation is 40%.
Monday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 86. Breezy. Chance of precipitation is 20%.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 81. Windy. Chance of precipitation is 30%.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 86. Breezy. Chance of precipitation is 20%.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 81. Breezy. Chance of precipitation is 30%.
Wednesday
A slight chance of showers and thunderstorms. Sunny, with a high near 86. Chance of precipitation is 20%.
Wednesday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 81. Chance of precipitation is 20%.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 86. Chance of precipitation is 20%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles W Marathon FL
 24.7°N 81.15°W (Elev. 0 ft)
Last Update:
5:15 pm EDT May 14, 2026
Forecast Valid:
5pm EDT May 14, 2026-6pm EDT May 21, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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