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.

Partly Cloudy

85°F

29°C

Humidity 72%
Wind Speed NE 15 mph
Barometer 30.04 in (1017.2 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 15 Oct 11:53 am EDT
Extended Forecast for

30 Miles N Marathon Airport FL

  • This Afternoon

    This Afternoon: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88. Southeast wind 9 to 11 mph.

    High: 88 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly between 2am and 4am. Partly cloudy, with a low around 77. East wind 6 to 9 mph.

    Low: 77 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. Northeast wind 6 to 9 mph becoming southeast in the afternoon. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 88 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 76. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 50%.

    Low: 76 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A chance of showers before 8am, then a chance of showers and thunderstorms between 8am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 86. Calm wind becoming north around 6 mph in the afternoon. Chance of precipitation is 80%.

    High: 86 °F

    Chance
    Showers then
    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 74. Northeast wind 8 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.

    Low: 74 °F

    Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 84. Breezy, with an east wind 15 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.

    High: 84 °F

    Showers and
    Breezy

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms after 8pm. Low around 73. Windy, with a northeast wind 17 to 22 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.

    Low: 73 °F

    Showers and
    Windy then
    Chance
    T-storms and
    Breezy

  • Monday

    Monday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Mostly sunny, with a high near 84. Breezy, with an east wind 17 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

    High: 84 °F

    Breezy.
    Chance
    T-storms then
    Showers
    Likely

Detailed Forecast

This Afternoon
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88. Southeast wind 9 to 11 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly between 2am and 4am. Partly cloudy, with a low around 77. East wind 6 to 9 mph.
Friday
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. Northeast wind 6 to 9 mph becoming southeast in the afternoon. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 76. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 50%.
Saturday
A chance of showers before 8am, then a chance of showers and thunderstorms between 8am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 86. Calm wind becoming north around 6 mph in the afternoon. Chance of precipitation is 80%.
Saturday Night
Showers and possibly a thunderstorm. Low around 74. Northeast wind 8 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.
Sunday
Showers and possibly a thunderstorm. High near 84. Breezy, with an east wind 15 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
Sunday Night
Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms after 8pm. Low around 73. Windy, with a northeast wind 17 to 22 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.
Monday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Mostly sunny, with a high near 84. Breezy, with an east wind 17 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Monday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms, mainly between 8pm and 2am. Partly cloudy, with a low around 72. Breezy. Chance of precipitation is 60%.
Tuesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85. Breezy.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72. Breezy.
Wednesday
A 40 percent chance of showers and thunderstorms. Sunny, with a high near 85.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
30 Miles N Marathon Airport FL
 25.16°N 81.1°W
Last Update:
11:26 am EDT Oct 15, 2026
Forecast Valid:
12pm EDT Oct 15, 2026-6pm EDT Oct 21, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation