Heavy Rains Expected to Impact Parts of the Eastern U.S.

A strong cold front will produce heavy rain will create mainly localized areas of flash flooding to the Great Lakes and Ohio Valley. There is another flash flood threat in the parts of the Southeast and Southern Appalachians. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Mostly Cloudy

82°F

28°C

Humidity 88%
Wind Speed NA
Barometer 29.97 in (1014.9 mb)
Dewpoint 78°F (26°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 21 Sep 2:53 am EDT
Extended Forecast for

Long Key FL

  • Overnight

    Overnight: A chance of showers and thunderstorms.  Partly cloudy, with a steady temperature around 85. Northeast wind around 10 mph.  Chance of precipitation is 40%.

    Chance
    Showers

    Low: 85 °F

  • Tuesday

    Tuesday: A chance of showers and thunderstorms.  Mostly sunny, with a high near 89. East wind 5 to 10 mph.  Chance of precipitation is 50%.

    Chance
    Showers

    High: 89 °F

  • Tuesday
    Night

    Tuesday Night: A chance of showers and thunderstorms.  Partly cloudy, with a steady temperature around 86. Northeast wind around 10 mph.  Chance of precipitation is 50%.

    Chance
    Showers

    Low: 86 °F

  • Wednesday

    Wednesday: A chance of showers and thunderstorms.  Mostly sunny, with a high near 91. East wind around 5 mph.  Chance of precipitation is 50%.

    Chance
    Showers

    High: 91 °F

  • Wednesday
    Night

    Wednesday Night: A chance of showers and thunderstorms.  Partly cloudy, with a low around 80. North wind around 5 mph becoming calm.  Chance of precipitation is 40%.

    Chance
    Showers

    Low: 80 °F

  • Thursday

    Thursday: A chance of showers and thunderstorms.  Mostly sunny, with a high near 91. Chance of precipitation is 40%.

    Chance
    Showers

    High: 91 °F

  • Thursday
    Night

    Thursday Night: A chance of showers and thunderstorms.  Partly cloudy, with a low around 80. Chance of precipitation is 40%.

    Chance
    Showers

    Low: 80 °F

  • Friday

    Friday: A chance of showers and thunderstorms.  Mostly sunny, with a high near 90. Chance of precipitation is 40%.

    Chance
    Showers

    High: 90 °F

  • Friday
    Night

    Friday Night: A chance of showers and thunderstorms.  Partly cloudy, with a low around 80. Chance of precipitation is 40%.

    Chance
    Showers

    Low: 80 °F

Detailed Forecast

Overnight
A chance of showers and thunderstorms. Partly cloudy, with a steady temperature around 85. Northeast wind around 10 mph. Chance of precipitation is 40%.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 89. East wind 5 to 10 mph. Chance of precipitation is 50%.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a steady temperature around 86. Northeast wind around 10 mph. Chance of precipitation is 50%.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 91. East wind around 5 mph. Chance of precipitation is 50%.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 80. North wind around 5 mph becoming calm. Chance of precipitation is 40%.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 91. Chance of precipitation is 40%.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 80. Chance of precipitation is 40%.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 90. Chance of precipitation is 40%.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 80. Chance of precipitation is 40%.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 80. Chance of precipitation is 30%.
Sunday
A chance of showers and thunderstorms. Sunny, with a high near 89. Chance of precipitation is 30%.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 80. Chance of precipitation is 30%.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 87. Chance of precipitation is 30%.
Click Map For Forecast
Point Forecast:
Long Key FL
 24.83°N 80.81°W (Elev. 0 ft)
3:15 am EDT Sep 21, 2021
3am EDT Sep 21, 2021-6pm EDT Sep 27, 2021
 
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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