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.

Fair

77°F

25°C

Humidity 71%
Wind Speed E 9 G 20 mph
Barometer 30.11 in (1019.6 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 9 Jan 5:53 pm EST
Extended Forecast for

31 Miles N Marathon Airport FL

  • Tonight

    Tonight: Mostly clear, with a low around 69. East wind around 10 mph.

    Low: 69 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 77. East wind 9 to 11 mph.

    High: 77 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 68. East wind around 7 mph.

    Low: 68 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 77. Northeast wind around 7 mph becoming northwest in the afternoon.

    High: 77 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 64. Breezy, with a northeast wind 7 to 16 mph, with gusts as high as 24 mph.

    Low: 64 °F

    Mostly Cloudy
    then Mostly
    Cloudy and
    Breezy

  • Monday

    Monday: Mostly sunny, with a high near 75. Breezy, with a northeast wind 14 to 16 mph, with gusts as high as 25 mph.

    High: 75 °F

    Mostly Sunny
    and Breezy
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 65. Northeast wind around 11 mph.

    Low: 65 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 75. East wind 9 to 13 mph.

    High: 75 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 66. East wind around 7 mph.

    Low: 66 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 69. East wind around 10 mph.
Saturday
Sunny, with a high near 77. East wind 9 to 11 mph.
Saturday Night
Mostly cloudy, with a low around 68. East wind around 7 mph.
Sunday
Mostly sunny, with a high near 77. Northeast wind around 7 mph becoming northwest in the afternoon.
Sunday Night
Mostly cloudy, with a low around 64. Breezy, with a northeast wind 7 to 16 mph, with gusts as high as 24 mph.
Monday
Mostly sunny, with a high near 75. Breezy, with a northeast wind 14 to 16 mph, with gusts as high as 25 mph.
Monday Night
Partly cloudy, with a low around 65. Northeast wind around 11 mph.
Tuesday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 75. East wind 9 to 13 mph.
Tuesday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 66. East wind around 7 mph.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 73.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Thursday
A 30 percent chance of showers. Mostly sunny, with a high near 71. Breezy.
Thursday Night
Partly cloudy, with a low around 53.
Friday
Sunny, with a high near 66.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
31 Miles N Marathon Airport FL
 25.19°N 81.15°W
Last Update:
3:31 pm EST Jan 9, 2026
Forecast Valid:
6pm EST Jan 9, 2026-6pm EST Jan 16, 2026
 
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Additional Resources

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Chance of Precipitation