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

Autumn Temperatures for Eastern Third of the Country; Super Typhoon Approaching Guam

Cooler and less humid conditions for the eastern third of the nation as a cold slides off the east coast. Combination of dry and breezy conditions may result in spread of wildfires across the lower Mississippi Valley. In addition, fire weather conditions linger into portions of Southern California. For Guam, a super typhoon is approaching. Read More >

Hazardous Weather Conditions

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

81°F

27°C

Humidity 91%
Wind Speed NE 5 mph
Barometer 29.97 in (1014.7 mb)
Dewpoint 78°F (26°C)
Visibility 10.00 mi
Heat Index89°F (32°C)
Last update 17 Oct 8:53 am EDT
Extended Forecast for

5 Miles WSW Long Key FL

  • Today

    Today: A chance of showers and thunderstorms. Partly sunny, with a high near 85. East wind around 5 mph becoming calm. Chance of precipitation is 50%.

    High: 85 °F

    Chance
    Showers

  • Tonight

    Tonight: Showers and possibly a thunderstorm. Low around 76. North wind around 10 mph. Chance of precipitation is 90%.

    Low: 76 °F

    Showers

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 83. Northeast wind around 15 mph. Chance of precipitation is 70%.

    High: 83 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 76. Northeast wind around 15 mph. Chance of precipitation is 30%.

    Low: 76 °F

    Chance
    Showers

  • Monday

    Monday: A chance of showers and thunderstorms. Mostly sunny, with a high near 83. Windy, with a northeast wind around 25 mph. Chance of precipitation is 30%.

    High: 83 °F

    Chance
    Showers and
    Windy

  • Monday Night

    Monday Night: A slight chance of showers. Mostly clear, with a low around 76. Windy. Chance of precipitation is 20%.

    Low: 76 °F

    Slight Chance
    Showers and
    Windy

  • Tuesday

    Tuesday: A slight chance of showers. Sunny, with a high near 83. Windy. Chance of precipitation is 20%.

    High: 83 °F

    Slight Chance
    Showers and
    Windy

  • Tuesday Night

    Tuesday Night: A slight chance of showers. Mostly clear, with a low around 76. Windy. Chance of precipitation is 10%.

    Low: 76 °F

    Slight Chance
    Showers and
    Windy

  • Wednesday

    Wednesday: A slight chance of showers. Sunny, with a high near 83. Windy. Chance of precipitation is 20%.

    High: 83 °F

    Slight Chance
    Showers and
    Windy

Detailed Forecast

Today
A chance of showers and thunderstorms. Partly sunny, with a high near 85. East wind around 5 mph becoming calm. Chance of precipitation is 50%.
Tonight
Showers and possibly a thunderstorm. Low around 76. North wind around 10 mph. Chance of precipitation is 90%.
Sunday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 83. Northeast wind around 15 mph. Chance of precipitation is 70%.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 76. Northeast wind around 15 mph. Chance of precipitation is 30%.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 83. Windy, with a northeast wind around 25 mph. Chance of precipitation is 30%.
Monday Night
A slight chance of showers. Mostly clear, with a low around 76. Windy. Chance of precipitation is 20%.
Tuesday
A slight chance of showers. Sunny, with a high near 83. Windy. Chance of precipitation is 20%.
Tuesday Night
A slight chance of showers. Mostly clear, with a low around 76. Windy. Chance of precipitation is 10%.
Wednesday
A slight chance of showers. Sunny, with a high near 83. Windy. Chance of precipitation is 20%.
Wednesday Night
A slight chance of showers. Mostly clear, with a low around 75. Windy. Chance of precipitation is 10%.
Thursday
A slight chance of showers. Sunny, with a high near 82. Breezy. Chance of precipitation is 20%.
Thursday Night
A slight chance of showers. Mostly clear, with a low around 75. Chance of precipitation is 20%.
Friday
A chance of showers. Sunny, with a high near 82. 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:
9:15 am EDT Oct 17, 2026
Forecast Valid:
9am EDT Oct 17, 2026-6pm EDT Oct 23, 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