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

Nor'easter Bringing Dangerous Coastal Conditions to the Mid-Atlantic; Pacific Storm to Impact the Southwest U.S.

A Nor'easter well off the East Coast will slowly track north this week and may gain some subtropical characteristics. Strong onshore winds will bring flooding, dangerous marine conditions, and beach erosion along the Mid-Atlantic coast. A Pacific storm will bring gusty winds, severe thunderstorms, and mountain snow to portions of California and the Southwest U.S. through Thursday. Read More >

Hazardous Weather Conditions

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

75°F

24°C

Humidity 74%
Wind Speed N 12 G 20 mph
Barometer 30.00 in (1015.7 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 21 Oct 8:53 am EDT
Extended Forecast for

Islamorada FL

Coastal Flood Advisory October 21, 09:06am until October 22, 05:00am
Click here for hazard details and duration
Coastal Flood Advisory
  •  
    Coastal Flood Advisory October 21, 09:06am until October 22, 05:00am

    NOW until 5:00am Thu

    Coastal Flood Advisory

  • Today

    High: 84 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 74. Northeast wind around 10 mph.

    Low: 74 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 83. North wind 10 to 15 mph.

    High: 83 °F

    Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Mostly clear, with a low around 73. Northeast wind around 15 mph. Chance of precipitation is 30%.

    Low: 73 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers and thunderstorms. Sunny, with a high near 81. Northeast wind around 15 mph. Chance of precipitation is 50%.

    High: 81 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 73. Chance of precipitation is 60%.

    Low: 73 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 82. Chance of precipitation is 70%.

    High: 82 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 75. Windy. Chance of precipitation is 70%.

    Low: 75 °F

    Showers
    Likely and
    Windy

Detailed Forecast

Today
Sunny, with a high near 84. Northeast wind 10 to 15 mph.
Tonight
Mostly clear, with a low around 74. Northeast wind around 10 mph.
Thursday
Sunny, with a high near 83. North wind 10 to 15 mph.
Thursday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 73. Northeast wind around 15 mph. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms. Sunny, with a high near 81. Northeast wind around 15 mph. Chance of precipitation is 50%.
Friday Night
Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 73. Chance of precipitation is 60%.
Saturday
Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 82. Chance of precipitation is 70%.
Saturday Night
Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 75. Windy. Chance of precipitation is 70%.
Sunday
Showers and possibly a thunderstorm. High near 81. Very windy. Chance of precipitation is 80%.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 75. Very windy. Chance of precipitation is 50%.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 82. Very windy. Chance of precipitation is 50%.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 75. Very windy. Chance of precipitation is 40%.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 82. Windy. Chance of precipitation is 40%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Islamorada FL
 24.93°N 80.62°W (Elev. 3 ft)
Last Update:
8:15 am EDT Oct 21, 2026
Forecast Valid:
9am EDT Oct 21, 2026-6pm EDT Oct 27, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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