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.

Mostly Cloudy

79°F

26°C

Humidity 82%
Wind Speed SE 7 mph
Barometer 29.92 in (1013.0 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 4 May 8:53 pm EDT
Extended Forecast for

5 Miles WSW Long Key FL

  • Tonight

    Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 76. East wind around 5 mph becoming northwest after midnight. Chance of precipitation is 50%.

    Low: 76 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 82. North wind around 5 mph. Chance of precipitation is 20%.

    High: 82 °F

    Slight Chance
    T-storms

  • Tuesday Night

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

    Low: 78 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 84. Calm wind becoming south around 5 mph in the afternoon.

    High: 84 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 80. Southeast wind around 5 mph.

    Low: 80 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 84.

    High: 84 °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 84.

    High: 84 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 79.

    Low: 79 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 76. East wind around 5 mph becoming northwest after midnight. Chance of precipitation is 50%.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 82. North wind around 5 mph. Chance of precipitation is 20%.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 78. West wind around 5 mph. Chance of precipitation is 10%.
Wednesday
Mostly sunny, with a high near 84. Calm wind becoming south around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 80. Southeast wind around 5 mph.
Thursday
Sunny, with a high near 84.
Thursday Night
Mostly clear, with a low around 79.
Friday
Mostly sunny, with a high near 84.
Friday Night
Partly cloudy, with a low around 79.
Saturday
Mostly sunny, with a high near 84.
Saturday Night
Partly cloudy, with a low around 80.
Sunday
Partly sunny, with a high near 85.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 80. Chance of precipitation is 10%.
Monday
A slight chance of showers. Mostly sunny, with a high near 84. Chance of precipitation is 10%.
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:
9:21 pm EDT May 4, 2026
Forecast Valid:
9pm EDT May 4, 2026-6pm EDT May 11, 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