Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

88°F

31°C

Humidity 70%
Wind Speed E 9 mph
Barometer 29.98 in (1015.1 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index100°F (38°C)
Last update 4 Oct 2:53 pm EDT
Extended Forecast for

23 Miles NNW Long Key FL

  • This Afternoon

    This Afternoon: Sunny, with a high near 87. East wind around 10 mph.

    High: 87 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 76. East wind 5 to 8 mph.

    Low: 76 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 87. East wind 3 to 7 mph.

    High: 87 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms before 10pm.  Partly cloudy, with a low around 75. Light and variable wind.

    Low: 75 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 2pm.  Mostly sunny, with a high near 86. Calm wind becoming south around 6 mph in the afternoon.

    High: 86 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am, then a slight chance of showers and thunderstorms after 2am.  Partly cloudy, with a low around 76. Calm wind.  Chance of precipitation is 20%.

    Low: 76 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms.  Mostly sunny, with a high near 85. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 85 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 77. Southwest wind 3 to 6 mph.

    Low: 77 °F

    Chance
    T-storms

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms.  Mostly sunny, with a high near 85. South wind 3 to 6 mph.

    High: 85 °F

    Chance
    T-storms

Detailed Forecast

This Afternoon
Sunny, with a high near 87. East wind around 10 mph.
Tonight
Partly cloudy, with a low around 76. East wind 5 to 8 mph.
Monday
Mostly sunny, with a high near 87. East wind 3 to 7 mph.
Monday Night
A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 75. Light and variable wind.
Tuesday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. Calm wind becoming south around 6 mph in the afternoon.
Tuesday Night
A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am, then a slight chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 76. Calm wind. Chance of precipitation is 20%.
Wednesday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 77. Southwest wind 3 to 6 mph.
Thursday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85. South wind 3 to 6 mph.
Thursday Night
A 20 percent chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 77.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Friday Night
Partly cloudy, with a low around 78.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
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ABOUT THIS FORECAST

 
Point Forecast:
23 Miles NNW Long Key FL
 25.14°N 80.92°W
2:31 pm EDT Oct 4, 2026
3pm EDT Oct 4, 2026-6pm EDT Oct 10, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database