National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

84°F

29°C

Humidity 77%
Wind Speed Vrbl 6 mph
Barometer 29.94 in (1013.6 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 29 Jul 7:53 am EDT
Extended Forecast for

5 Miles WSW Long Key FL

  • Today

    Today: A slight chance of showers and thunderstorms. Sunny, with a high near 90. Southwest wind around 10 mph. Chance of precipitation is 10%.

    High: 90 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Partly cloudy, with a low around 83. Southwest wind 5 to 10 mph.

    Low: 83 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers and thunderstorms after 9am. Sunny, with a high near 90. Southwest wind around 5 mph. Chance of precipitation is 10%.

    High: 90 °F

    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 83. Southwest wind around 5 mph becoming calm.

    Low: 83 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 91. South wind around 5 mph. Chance of precipitation is 10%.

    High: 91 °F

    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 82. Chance of precipitation is 10%.

    Low: 82 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 91. Chance of precipitation is 20%.

    High: 91 °F

    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: A slight chance of showers. Mostly cloudy, with a low around 83. Chance of precipitation is 10%.

    Low: 83 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny

Detailed Forecast

Today
A slight chance of showers and thunderstorms. Sunny, with a high near 90. Southwest wind around 10 mph. Chance of precipitation is 10%.
Tonight
Partly cloudy, with a low around 83. Southwest wind 5 to 10 mph.
Thursday
A slight chance of showers and thunderstorms after 9am. Sunny, with a high near 90. Southwest wind around 5 mph. Chance of precipitation is 10%.
Thursday Night
Partly cloudy, with a low around 83. Southwest wind around 5 mph becoming calm.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 91. South wind around 5 mph. Chance of precipitation is 10%.
Friday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 82. Chance of precipitation is 10%.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 91. Chance of precipitation is 20%.
Saturday Night
A slight chance of showers. Mostly cloudy, with a low around 83. Chance of precipitation is 10%.
Sunday
Mostly sunny, with a high near 88.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 83. Chance of precipitation is 10%.
Monday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 20%.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 83. Chance of precipitation is 20%.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Long Key FL
 24.79°N 80.89°W (Elev. 0 ft)
Last Update:
7:15 am EDT Jul 29, 2026
Forecast Valid:
8am EDT Jul 29, 2026-6pm EDT Aug 4, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation