Hazardous Coastal Conditions for the Mid-Atlantic; Storm System Approaching Southern Alaska

A Nor'easter will create hazardous marine and coastal conditions along the Mid-Atlantic coast through mid-week, with significant coastal flooding and beach erosion possible. Meanwhile, another strong storm system is forecast to bring high winds and heavy precipitation to portions of southern Alaska. Elsewhere, relatively benign weather is expected through the first half of the work week. Read More >

Hazardous Weather Conditions

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

A Few Clouds

81°F

27°C

Humidity 69%
Wind Speed NE 13 G 26 mph
Barometer 30.01 in (1016.3 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 18 Oct 8:53 pm EDT
Extended Forecast for

Key Colony Beach FL

  • Tonight

    Tonight: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 78. Breezy, with a northeast wind 15 to 20 mph.  Chance of precipitation is 50%.

    Low: 78 °F

    Chance
    Showers and
    Breezy

  • Monday

    Monday: A chance of showers and thunderstorms.  Mostly sunny, with a high near 84. Northeast wind around 15 mph.  Chance of precipitation is 40%.

    High: 84 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Mostly clear, with a low around 77. Northeast wind around 15 mph.

    Low: 77 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 84. Northeast wind around 15 mph.

    High: 84 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 76. Northeast wind around 15 mph.

    Low: 76 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 76.

    Low: 76 °F

    Mostly Clear

  • Thursday

    Thursday: A chance of showers and thunderstorms.  Mostly sunny, with a high near 83. Chance of precipitation is 30%.

    High: 83 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms.  Mostly clear, with a low around 75. Chance of precipitation is 30%.

    Low: 75 °F

    Chance
    Showers

Detailed Forecast

Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 78. Breezy, with a northeast wind 15 to 20 mph. Chance of precipitation is 50%.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 84. Northeast wind around 15 mph. Chance of precipitation is 40%.
Monday Night
Mostly clear, with a low around 77. Northeast wind around 15 mph.
Tuesday
Sunny, with a high near 84. Northeast wind around 15 mph.
Tuesday Night
Mostly clear, with a low around 76. Northeast wind around 15 mph.
Wednesday
Sunny, with a high near 84.
Wednesday Night
Mostly clear, with a low around 76.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 83. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 75. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 83. Chance of precipitation is 50%.
Friday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 75. Chance of precipitation is 30%.
Saturday
A chance of showers and thunderstorms. Sunny, with a high near 83. Breezy. Chance of precipitation is 50%.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 74. Windy. Chance of precipitation is 30%.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 83. Windy. Chance of precipitation is 50%.
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ABOUT THIS FORECAST

 
Point Forecast:
Key Colony Beach FL
 24.71°N 81.02°W (Elev. 0 ft)
9:15 pm EDT Oct 18, 2026
9pm EDT Oct 18, 2026-6pm EDT Oct 25, 2026
 
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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