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.

Mostly Cloudy

89°F

32°C

Humidity 70%
Wind Speed E 10 mph
Barometer 30.12 in (1019.9 mb)
Dewpoint 78°F (26°C)
Visibility 10.00 mi
Heat Index103°F (39°C)
Last update 8 Jul 11:53 am EDT
Extended Forecast for

Big Pine Key FL

  • This Afternoon

    This Afternoon: A slight chance of showers and thunderstorms. Sunny, with a high near 92. East wind 10 to 15 mph. Chance of precipitation is 20%.

    High: 92 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Partly cloudy, with a low around 83. East wind around 15 mph.

    Low: 83 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 92. East wind around 15 mph.

    High: 92 °F

    Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 82. East wind around 15 mph. Chance of precipitation is 30%.

    Low: 82 °F

    Chance
    T-storms

  • Friday

    Friday: A chance of showers and thunderstorms. Mostly sunny, with a high near 92. East wind around 15 mph. Chance of precipitation is 30%.

    High: 92 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 82. Chance of precipitation is 40%.

    Low: 82 °F

    Chance
    T-storms

  • Saturday

    Saturday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 92. Chance of precipitation is 20%.

    High: 92 °F

    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 83.

    Low: 83 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 93.

    High: 93 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A slight chance of showers and thunderstorms. Sunny, with a high near 92. East wind 10 to 15 mph. Chance of precipitation is 20%.
Tonight
Partly cloudy, with a low around 83. East wind around 15 mph.
Thursday
Sunny, with a high near 92. East wind around 15 mph.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 82. East wind around 15 mph. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 92. East wind around 15 mph. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 82. Chance of precipitation is 40%.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 92. Chance of precipitation is 20%.
Saturday Night
Partly cloudy, with a low around 83.
Sunday
Mostly sunny, with a high near 93.
Sunday Night
Mostly clear, with a low around 82.
Monday
Sunny, with a high near 93.
Monday Night
Mostly clear, with a low around 82.
Tuesday
Sunny, with a high near 93.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Big Pine Key FL
 24.68°N 81.35°W (Elev. 3 ft)
Last Update:
11:15 am EDT Jul 8, 2026
Forecast Valid:
12pm EDT Jul 8, 2026-6pm EDT Jul 14, 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