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

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

Lat: 41.33°NLon: 72.05°WElev: 10ft.

Partly Cloudy

31°F

-1°C

Humidity 56%
Wind Speed SW 7 mph
Barometer 30.01 in (1016.2 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 10 Feb 2:56 pm EST
Extended Forecast for

South Lyme CT

  • This Afternoon

    This Afternoon: A 20 percent chance of snow. Mostly cloudy, with a high near 34. Light south wind.

    High: 34 °F

    Slight Chance
    Snow

  • Tonight

    Tonight: Rain and snow, becoming all rain after 1am, then gradually ending. Low around 27. Calm wind. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Low: 27 °F

    Rain/Snow

  • Wednesday

    Wednesday: Mostly sunny, with a high near 39. Wind chill values between 25 and 30. Light west wind increasing to 9 to 14 mph in the morning. Winds could gust as high as 26 mph.

    High: 39 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 22. Wind chill values between 10 and 15. West wind around 11 mph, with gusts as high as 26 mph.

    Low: 22 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 34. Northwest wind 11 to 15 mph, with gusts as high as 28 mph.

    High: 34 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 16.

    Low: 16 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 35.

    High: 35 °F

    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 22.

    Low: 22 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 39.

    High: 39 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of snow. Mostly cloudy, with a high near 34. Light south wind.
Tonight
Rain and snow, becoming all rain after 1am, then gradually ending. Low around 27. Calm wind. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Wednesday
Mostly sunny, with a high near 39. Wind chill values between 25 and 30. Light west wind increasing to 9 to 14 mph in the morning. Winds could gust as high as 26 mph.
Wednesday Night
Partly cloudy, with a low around 22. Wind chill values between 10 and 15. West wind around 11 mph, with gusts as high as 26 mph.
Thursday
Mostly sunny, with a high near 34. Northwest wind 11 to 15 mph, with gusts as high as 28 mph.
Thursday Night
Partly cloudy, with a low around 16.
Friday
Sunny, with a high near 35.
Friday Night
Mostly cloudy, with a low around 22.
Saturday
Mostly sunny, with a high near 39.
Saturday Night
Mostly clear, with a low around 22.
Sunday
Mostly sunny, with a high near 39.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 27. Chance of precipitation is 40%.
Washington's Birthday
A chance of rain and snow. Mostly cloudy, with a high near 42. Chance of precipitation is 40%.
Monday Night
Partly cloudy, with a low around 29.
Tuesday
Mostly sunny, with a high near 42.
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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:
1:06 pm EST Feb 10, 2026
Forecast Valid:
3pm EST Feb 10, 2026-6pm EST Feb 17, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation