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.

Fair

16°F

-9°C

Humidity 47%
Wind Speed W 7 mph
Barometer 29.85 in (1010.9 mb)
Dewpoint -1°F (-18°C)
Visibility 10.00 mi
Wind Chill6°F (-14°C)
Last update 1 Jan 10:56 pm EST
Extended Forecast for

South Lyme CT

  • Tonight

    Tonight: A chance of flurries after 1am. Mostly cloudy, with a low around 16. Wind chill values between 10 and 15. West wind around 7 mph.

    Low: 16 °F

    Chance
    Flurries

  • Friday

    Friday: Mostly sunny, with a high near 29. Wind chill values between 10 and 20. West wind 6 to 10 mph, with gusts as high as 20 mph.

    High: 29 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 16. Wind chill values between 10 and 15. West wind around 6 mph.

    Low: 16 °F

    Mostly Clear

  • Saturday

    Saturday: Increasing clouds, with a high near 31. Wind chill values between 10 and 20. West wind 5 to 7 mph.

    High: 31 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: A 20 percent chance of snow showers after 1am. Cloudy, with a low around 20. Light and variable wind.

    Low: 20 °F

    Cloudy then
    Slight Chance
    Snow Showers

  • Sunday

    Sunday: Cloudy through mid morning, then gradual clearing, with a high near 32.

    High: 32 °F

    Gradual
    Clearing

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 15.

    Low: 15 °F

    Mostly Clear

  • Monday

    Monday: Partly sunny, with a high near 31.

    High: 31 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 23.

    Low: 23 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A chance of flurries after 1am. Mostly cloudy, with a low around 16. Wind chill values between 10 and 15. West wind around 7 mph.
Friday
Mostly sunny, with a high near 29. Wind chill values between 10 and 20. West wind 6 to 10 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 16. Wind chill values between 10 and 15. West wind around 6 mph.
Saturday
Increasing clouds, with a high near 31. Wind chill values between 10 and 20. West wind 5 to 7 mph.
Saturday Night
A 20 percent chance of snow showers after 1am. Cloudy, with a low around 20. Light and variable wind.
Sunday
Cloudy through mid morning, then gradual clearing, with a high near 32.
Sunday Night
Mostly clear, with a low around 15.
Monday
Partly sunny, with a high near 31.
Monday Night
Mostly cloudy, with a low around 23.
Tuesday
Mostly cloudy, with a high near 41.
Tuesday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 31.
Wednesday
A 40 percent chance of rain. Mostly cloudy, with a high near 45.
Wednesday Night
Partly cloudy, with a low around 30.
Thursday
Mostly sunny, with a high near 43.
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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:
8:57 pm EST Jan 1, 2026
Forecast Valid:
11pm EST Jan 1, 2026-6pm EST Jan 8, 2026
 
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Additional Resources

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Chance of Precipitation