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

Hazardous Weather Conditions

Current conditions at

Groton / New London, Groton / New London Airport (KGON)

Lat: 41.33°NLon: 72.05°WElev: 10ft.

Light Snow Fog/Mist

33°F

1°C

Humidity 96%
Wind Speed NE 6 mph
Barometer 29.85 in (1010.8 mb)
Dewpoint 32°F (0°C)
Visibility 4.00 mi
Wind Chill27°F (-3°C)
Last update 18 Jan 4:56 pm EST
Extended Forecast for

South Lyme CT

Winter Weather Advisory January 18, 05:28pm until January 19, 04:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory January 18, 05:28pm until January 19, 04:00am

    NOW until 4:00am Mon

    Winter Weather Advisory

  • This Afternoon

    High: 34 °F

    Snow

  • Tonight

    Tonight: Snow, mainly before 1am. Low around 22. Light and variable wind. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.

    Low: 22 °F

    Snow

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 32. Wind chill values between 20 and 25. West wind 5 to 15 mph, with gusts as high as 28 mph.

    High: 32 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 16. West wind around 9 mph, with gusts as high as 24 mph.

    Low: 16 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 25. West wind 7 to 15 mph, with gusts as high as 26 mph.

    High: 25 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 10.

    Low: 10 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 37.

    High: 37 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Snow. High near 34. Calm wind. Chance of precipitation is 100%. Total daytime snow accumulation of less than one inch possible.
Tonight
Snow, mainly before 1am. Low around 22. Light and variable wind. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.
M.L.King Day
Mostly sunny, with a high near 32. Wind chill values between 20 and 25. West wind 5 to 15 mph, with gusts as high as 28 mph.
Monday Night
Partly cloudy, with a low around 16. West wind around 9 mph, with gusts as high as 24 mph.
Tuesday
Mostly sunny, with a high near 25. West wind 7 to 15 mph, with gusts as high as 26 mph.
Tuesday Night
Mostly clear, with a low around 10.
Wednesday
Mostly sunny, with a high near 37.
Wednesday Night
Mostly cloudy, with a low around 28.
Thursday
Partly sunny, with a high near 37.
Thursday Night
Mostly clear, with a low around 18.
Friday
Mostly sunny, with a high near 32.
Friday Night
Mostly cloudy, with a low around 23.
Saturday
A chance of rain and snow. Mostly cloudy, with a high near 35. Chance of precipitation is 30%.
Saturday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 15.
Sunday
A chance of snow. Partly sunny, with a high near 27.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Lyme CT
 41.32°N 72.29°W (Elev. 98 ft)
Last Update:
10:00 am EST Jan 18, 2026
Forecast Valid:
5pm EST Jan 18, 2026-6pm EST Jan 25, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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