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 82%
Wind Speed E 10 mph
Barometer 29.96 in (1014.4 mb)
Dewpoint 78°F (26°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 4 Oct 5:53 am EDT
Extended Forecast for

23 Miles NNW Long Key FL

  • Today

    Today: Mostly sunny, with a high near 87. East wind 8 to 10 mph.

    High: 87 °F

    Mostly 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. Southeast wind 3 to 7 mph.

    High: 87 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am.  Partly cloudy, with a low around 75. Light east wind.  Chance of precipitation is 20%.

    Low: 75 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 11am.  Mostly sunny, with a high near 86. Calm wind becoming south 5 to 7 mph in the afternoon.  Chance of precipitation is 30%.

    High: 86 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 2am, then a slight chance of showers.  Mostly cloudy, with a low around 76. Calm wind.  Chance of precipitation is 30%.

    Low: 76 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 8am.  Mostly sunny, with a high near 86. Light south wind becoming southwest 5 to 10 mph in the morning.  Chance of precipitation is 50%.

    High: 86 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 77. South wind around 6 mph.

    Low: 77 °F

    Chance
    T-storms

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms.  Mostly sunny, with a high near 84. South wind 5 to 8 mph.

    High: 84 °F

    Chance
    T-storms

Detailed Forecast

Today
Mostly sunny, with a high near 87. East wind 8 to 10 mph.
Tonight
Partly cloudy, with a low around 76. East wind 5 to 8 mph.
Monday
Mostly sunny, with a high near 87. Southeast wind 3 to 7 mph.
Monday Night
A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Partly cloudy, with a low around 75. Light east wind. Chance of precipitation is 20%.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 86. Calm wind becoming south 5 to 7 mph in the afternoon. Chance of precipitation is 30%.
Tuesday Night
A chance of showers and thunderstorms before 2am, then a slight chance of showers. Mostly cloudy, with a low around 76. Calm wind. Chance of precipitation is 30%.
Wednesday
A chance of showers, with thunderstorms also possible after 8am. Mostly sunny, with a high near 86. Light south wind becoming southwest 5 to 10 mph in the morning. Chance of precipitation is 50%.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 77. South wind around 6 mph.
Thursday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84. South wind 5 to 8 mph.
Thursday Night
A 20 percent chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 77.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 78.
Saturday
A 30 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
4:17 am EDT Oct 4, 2026
6am EDT Oct 4, 2026-6pm EDT Oct 10, 2026
 
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Additional Resources

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Hourly Weather Forecast

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