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.

A Few Clouds

85°F

29°C

Humidity 75%
Wind Speed E 7 mph
Barometer 30.04 in (1017.3 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 16 Aug 1:53 am EDT
Extended Forecast for

5 Miles WSW Long Key FL

  • Overnight

    Overnight: A slight chance of showers and thunderstorms. Mostly clear, with a low around 83. East wind around 5 mph. Chance of precipitation is 20%.

    Low: 83 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: A chance of showers and thunderstorms, mainly after 8am. Mostly sunny, with a high near 88. East wind 5 to 10 mph. Chance of precipitation is 30%.

    High: 88 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 82. East wind around 5 mph. Chance of precipitation is 30%.

    Low: 82 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of showers and thunderstorms. Sunny, with a high near 87. Southeast wind around 5 mph. Chance of precipitation is 30%.

    High: 87 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Mostly clear, with a low around 83. East wind around 5 mph. Chance of precipitation is 30%.

    Low: 83 °F

    Chance
    Showers

  • Monday

    Monday: A chance of showers and thunderstorms. Sunny, with a high near 88. Chance of precipitation is 30%.

    High: 88 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Mostly clear, with a low around 82. Chance of precipitation is 30%.

    Low: 82 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers and thunderstorms. Sunny, with a high near 88. Chance of precipitation is 30%.

    High: 88 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms. Mostly clear, with a low around 83. Chance of precipitation is 40%.

    Low: 83 °F

    Chance
    Showers

Detailed Forecast

Overnight
A slight chance of showers and thunderstorms. Mostly clear, with a low around 83. East wind around 5 mph. Chance of precipitation is 20%.
Saturday
A chance of showers and thunderstorms, mainly after 8am. Mostly sunny, with a high near 88. East wind 5 to 10 mph. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 82. East wind around 5 mph. Chance of precipitation is 30%.
Sunday
A chance of showers and thunderstorms. Sunny, with a high near 87. Southeast wind around 5 mph. Chance of precipitation is 30%.
Sunday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 83. East wind around 5 mph. Chance of precipitation is 30%.
Monday
A chance of showers and thunderstorms. Sunny, with a high near 88. Chance of precipitation is 30%.
Monday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 82. Chance of precipitation is 30%.
Tuesday
A chance of showers and thunderstorms. Sunny, with a high near 88. Chance of precipitation is 30%.
Tuesday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 83. Chance of precipitation is 40%.
Wednesday
A chance of showers and thunderstorms. Sunny, with a high near 88. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 82. Chance of precipitation is 30%.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 83. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 30%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Long Key FL
 24.79°N 80.89°W (Elev. 0 ft)
Last Update:
2:15 am EDT Aug 16, 2025
Forecast Valid:
2am EDT Aug 16, 2025-6pm EDT Aug 22, 2025
 
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