Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East

Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Overcast

60°F

16°C

Humidity 72%
Wind Speed NE 14 G 26 mph
Barometer 30.22 in (1023.1 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 20 Jan 5:53 am EST
Extended Forecast for

Marathon Shores FL

  • Today

    Today: Mostly sunny, with a high near 70. Breezy, with a northeast wind around 20 mph.

    High: 70 °F

    Mostly Sunny
    and Breezy

  • Tonight

    Tonight: Partly cloudy, with a low around 66. Breezy, with a northeast wind 15 to 20 mph.

    Low: 66 °F

    Partly Cloudy
    and Breezy

  • Wednesday

    Wednesday: A slight chance of showers.  Mostly sunny, with a high near 76. Northeast wind around 15 mph.  Chance of precipitation is 10%.

    High: 76 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers.  Mostly cloudy, with a low around 68. Northeast wind 10 to 15 mph.  Chance of precipitation is 30%.

    Low: 68 °F

    Chance
    Showers

  • Thursday

    Thursday: A chance of showers.  Partly sunny, with a high near 78. East wind around 10 mph.  Chance of precipitation is 30%.

    High: 78 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A slight chance of showers.  Partly cloudy, with a low around 71. Chance of precipitation is 20%.

    Low: 71 °F

    Slight Chance
    Showers

  • Friday

    Friday: A slight chance of showers.  Mostly sunny, with a high near 79. Chance of precipitation is 20%.

    High: 79 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of showers.  Mostly clear, with a low around 71. Chance of precipitation is 10%.

    Low: 71 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 70. Breezy, with a northeast wind around 20 mph.
Tonight
Partly cloudy, with a low around 66. Breezy, with a northeast wind 15 to 20 mph.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 76. Northeast wind around 15 mph. Chance of precipitation is 10%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 68. Northeast wind 10 to 15 mph. Chance of precipitation is 30%.
Thursday
A chance of showers. Partly sunny, with a high near 78. East wind around 10 mph. Chance of precipitation is 30%.
Thursday Night
A slight chance of showers. Partly cloudy, with a low around 71. Chance of precipitation is 20%.
Friday
A slight chance of showers. Mostly sunny, with a high near 79. Chance of precipitation is 20%.
Friday Night
A slight chance of showers. Mostly clear, with a low around 71. Chance of precipitation is 10%.
Saturday
Sunny, with a high near 80.
Saturday Night
A slight chance of showers. Mostly clear, with a low around 72. Chance of precipitation is 10%.
Sunday
A slight chance of showers. Sunny, with a high near 81. Chance of precipitation is 10%.
Sunday Night
A slight chance of showers. Mostly clear, with a low around 67. Chance of precipitation is 10%.
Monday
A slight chance of showers. Mostly sunny, with a high near 77. Chance of precipitation is 10%.
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ABOUT THIS FORECAST

 
Point Forecast:
Marathon Shores FL
 24.72°N 81.05°W (Elev. 0 ft)
6:15 am EST Jan 20, 2026
6am EST Jan 20, 2026-6pm EST Jan 26, 2026
 
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Additional Resources

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Hourly Weather Forecast

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