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.

Overcast

21°F

-6°C

Humidity 62%
Wind Speed W 8 mph
Barometer 29.79 in (1008.6 mb)
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Wind Chill11°F (-12°C)
Last update 2 Jan 8:56 am EST
Extended Forecast for

South Lyme CT

  • Today

    Today: A chance of flurries before 11am. Mostly sunny, with a high near 29. Wind chill values between 15 and 20. West wind 7 to 13 mph.

    High: 29 °F

    Chance
    Flurries

  • Tonight

    Tonight: Mostly clear, with a low around 16. West wind around 7 mph.

    Low: 16 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 31. Wind chill values between 5 and 15. West wind 5 to 8 mph.

    High: 31 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of snow after 1am. Cloudy, with a low around 20. Calm wind.

    Low: 20 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: Cloudy through mid morning, then gradual clearing, with a high near 32. Calm wind becoming northwest 5 to 8 mph in the morning.

    High: 32 °F

    Gradual
    Clearing

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 14.

    Low: 14 °F

    Mostly Clear

  • Monday

    Monday: Increasing clouds, with a high near 31.

    High: 31 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: Cloudy, with a low around 22.

    Low: 22 °F

    Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 41.

    High: 41 °F

    Mostly Cloudy

Detailed Forecast

Today
A chance of flurries before 11am. Mostly sunny, with a high near 29. Wind chill values between 15 and 20. West wind 7 to 13 mph.
Tonight
Mostly clear, with a low around 16. West wind around 7 mph.
Saturday
Mostly sunny, with a high near 31. Wind chill values between 5 and 15. West wind 5 to 8 mph.
Saturday Night
A 30 percent chance of snow after 1am. Cloudy, with a low around 20. Calm wind.
Sunday
Cloudy through mid morning, then gradual clearing, with a high near 32. Calm wind becoming northwest 5 to 8 mph in the morning.
Sunday Night
Mostly clear, with a low around 14.
Monday
Increasing clouds, with a high near 31.
Monday Night
Cloudy, with a low around 22.
Tuesday
Mostly cloudy, with a high near 41.
Tuesday Night
Mostly cloudy, with a low around 31.
Wednesday
Mostly cloudy, with a high near 44.
Wednesday Night
Mostly cloudy, with a low around 29.
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:
9:15 am EST Jan 2, 2026
Forecast Valid:
9am EST Jan 2, 2026-6pm EST Jan 8, 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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation