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 >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Mostly Cloudy

79°F

26°C

Humidity 88%
Wind Speed NE 10 G 23 mph
Barometer 29.97 in (1014.8 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 18 Oct 2:53 am EDT
Extended Forecast for

5 Miles WSW Long Key FL

  • Overnight

    Overnight: Showers and possibly a thunderstorm. Low around 77. Northeast wind around 10 mph. Chance of precipitation is 80%.

    Low: 77 °F

    Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 83. Breezy, with a northeast wind around 20 mph. Chance of precipitation is 80%.

    High: 83 °F

    Showers and
    Breezy

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 77. Breezy, with a northeast wind around 20 mph. Chance of precipitation is 50%. New rainfall amounts between 2 and 3 inches possible.

    Low: 77 °F

    Chance
    Showers and
    Breezy

  • Monday

    Monday: A chance of showers and thunderstorms. Mostly sunny, with a high near 84. Breezy, with a northeast wind around 20 mph. Chance of precipitation is 40%.

    High: 84 °F

    Chance
    Showers and
    Breezy

  • Monday Night

    Monday Night: A slight chance of showers. Partly cloudy, with a low around 77. Windy, with a northeast wind 20 to 25 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.

    Low: 77 °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 20%.

    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

  • Wednesday Night

    Wednesday 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

Detailed Forecast

Overnight
Showers and possibly a thunderstorm. Low around 77. Northeast wind around 10 mph. Chance of precipitation is 80%.
Sunday
Showers and possibly a thunderstorm. High near 83. Breezy, with a northeast wind around 20 mph. Chance of precipitation is 80%.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 77. Breezy, with a northeast wind around 20 mph. Chance of precipitation is 50%. New rainfall amounts between 2 and 3 inches possible.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 84. Breezy, with a northeast wind around 20 mph. Chance of precipitation is 40%.
Monday Night
A slight chance of showers. Partly cloudy, with a low around 77. Windy, with a northeast wind 20 to 25 mph, with gusts as high as 30 mph. 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 20%.
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 76. Windy. Chance of precipitation is 20%.
Thursday
A chance of showers and thunderstorms. Sunny, with a high near 82. Breezy. Chance of precipitation is 30%.
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 40%.
Friday Night
A chance of showers. Mostly clear, with a low around 75. Chance of precipitation is 30%.
Saturday
A chance of showers. Sunny, with a high near 82. Breezy. Chance of precipitation is 50%.
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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:
3:15 am EDT Oct 18, 2026
Forecast Valid:
3am EDT Oct 18, 2026-6pm EDT Oct 24, 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