Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

A Few Clouds

84°F

29°C

Humidity 77%
Wind Speed E 13 mph
Barometer 30.02 in (1016.3 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 14 Oct 11:53 pm EDT
Extended Forecast for

26 Miles NNW Long Key FL

  • Overnight

    Overnight: A 30 percent chance of showers and thunderstorms, mainly before 2am.  Partly cloudy, with a low around 76. Northeast wind 5 to 7 mph.

    Low: 76 °F

    Chance
    Showers

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms, mainly after 2pm.  Mostly sunny, with a high near 89. Heat index values as high as 100. East wind 5 to 10 mph.

    High: 89 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 2am, then a slight chance of showers and thunderstorms after 3am.  Partly cloudy, with a low around 77. East wind 5 to 8 mph.  Chance of precipitation is 30%.

    Low: 77 °F

    Chance
    T-storms

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms, mainly after 2pm.  Mostly sunny, with a high near 88. Southeast wind 5 to 8 mph.

    High: 88 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms before 2am.  Partly cloudy, with a low around 75. Light northeast wind.

    Low: 75 °F

    Chance
    T-storms

  • Saturday

    Saturday: A chance of showers and thunderstorms between 8am and 2pm, then showers likely and possibly a thunderstorm after 2pm.  Mostly sunny, with a high near 87. Light northeast wind.  Chance of precipitation is 70%.

    High: 87 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms after 8pm.  Mostly cloudy, with a low around 76. Northeast wind 11 to 15 mph, with gusts as high as 20 mph.  Chance of precipitation is 60%.

    Low: 76 °F

    Showers
    Likely then
    Chance
    T-storms

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm.  Partly sunny, with a high near 83. Windy, with an east wind 18 to 22 mph, with gusts as high as 28 mph.  Chance of precipitation is 70%.

    High: 83 °F

    Showers
    Likely and
    Windy

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 76. Windy, with a northeast wind 20 to 24 mph, with gusts as high as 28 mph.

    Low: 76 °F

    Chance
    T-storms and
    Windy

Detailed Forecast

Overnight
A 30 percent chance of showers and thunderstorms, mainly before 2am. Partly cloudy, with a low around 76. Northeast wind 5 to 7 mph.
Thursday
A 30 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 89. Heat index values as high as 100. East wind 5 to 10 mph.
Thursday Night
A chance of showers and thunderstorms before 2am, then a slight chance of showers and thunderstorms after 3am. Partly cloudy, with a low around 77. East wind 5 to 8 mph. Chance of precipitation is 30%.
Friday
A 50 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 88. Southeast wind 5 to 8 mph.
Friday Night
A 40 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 75. Light northeast wind.
Saturday
A chance of showers and thunderstorms between 8am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly sunny, with a high near 87. Light northeast wind. Chance of precipitation is 70%.
Saturday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms after 8pm. Mostly cloudy, with a low around 76. Northeast wind 11 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Sunday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 83. Windy, with an east wind 18 to 22 mph, with gusts as high as 28 mph. Chance of precipitation is 70%.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 76. Windy, with a northeast wind 20 to 24 mph, with gusts as high as 28 mph.
Monday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 84. Windy. Chance of precipitation is 60%.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75. Windy.
Tuesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85. Windy.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75. Breezy.
Wednesday
A 40 percent chance of showers and thunderstorms. Sunny, with a high near 84. Breezy.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
26 Miles NNW Long Key FL
 25.19°N 80.94°W
5:17 pm EDT Oct 14, 2026
12am EDT Oct 15, 2026-6pm EDT Oct 21, 2026
 
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