Heavy Rainfall and Flooding Concerns in the Southwest; Coastal Low to Impact the East Coast

Deep tropical moisture will lead to widespread showers and thunderstorms capable of producing flash flooding through early next week over the Southwest and Four Corners. A coastal storm is expected to impact the southeast U.S. coast and mid-Atlantic regions with flooding, dangerous rip currents, gusty winds and heavy rain up much of the East Coast through early next week. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Mostly Cloudy

78°F

26°C

Humidity 85%
Wind Speed Calm
Barometer 29.73 in (1006.8 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 11 Oct 11:53 pm EDT
Extended Forecast for

Long Key FL

Coastal Flood Advisory October 12, 12:31am until October 12, 06:00am
Click here for hazard details and duration
Coastal Flood Advisory
  •  
    Coastal Flood Advisory October 12, 12:31am until October 12, 06:00am

    NOW until 6:00am Sun

    Coastal Flood Advisory

  • Overnight

    Low: 75 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers.  Mostly sunny, with a high near 85. North wind 5 to 10 mph.  Chance of precipitation is 20%.

    High: 85 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: A slight chance of showers.  Mostly clear, with a low around 75. Northwest wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 10%.

    Low: 75 °F

    Slight Chance
    Showers

  • Columbus Day

    Columbus Day: A slight chance of showers.  Sunny, with a high near 86. North wind around 5 mph.  Chance of precipitation is 10%.

    High: 86 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of showers.  Partly cloudy, with a low around 77. Northeast wind 5 to 10 mph.  Chance of precipitation is 20%.

    Low: 77 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers.  Mostly sunny, with a high near 86. Chance of precipitation is 10%.

    High: 86 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of showers.  Partly cloudy, with a low around 77. Chance of precipitation is 10%.

    Low: 77 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers.  Mostly sunny, with a high near 86. Chance of precipitation is 10%.

    High: 86 °F

    Slight Chance
    Showers

Detailed Forecast

Overnight
A slight chance of showers. Partly cloudy, with a low around 75. North wind 5 to 10 mph. Chance of precipitation is 20%.
Sunday
A slight chance of showers. Mostly sunny, with a high near 85. North wind 5 to 10 mph. Chance of precipitation is 20%.
Sunday Night
A slight chance of showers. Mostly clear, with a low around 75. Northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 10%.
Columbus Day
A slight chance of showers. Sunny, with a high near 86. North wind around 5 mph. Chance of precipitation is 10%.
Monday Night
A slight chance of showers. Partly cloudy, with a low around 77. Northeast wind 5 to 10 mph. Chance of precipitation is 20%.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 86. Chance of precipitation is 10%.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 77. Chance of precipitation is 10%.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 86. Chance of precipitation is 10%.
Wednesday Night
Partly cloudy, with a low around 77.
Thursday
A slight chance of showers. Mostly sunny, with a high near 85. Chance of precipitation is 10%.
Thursday Night
A slight chance of showers. Partly cloudy, with a low around 77. Chance of precipitation is 20%.
Friday
A slight chance of showers. Mostly sunny, with a high near 86. Chance of precipitation is 20%.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 77. Chance of precipitation is 20%.
Saturday
A slight chance of showers. Mostly sunny, with a high near 84. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
Long Key FL
 24.83°N 80.81°W (Elev. 0 ft)
12:15 am EDT Oct 12, 2025
12am EDT Oct 12, 2025-6pm EDT Oct 18, 2025
 
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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