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

38°F

3°C

Humidity 52%
Wind Speed W 15 mph
Barometer 29.69 in (1005.4 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 11 Feb 5:56 pm EST
Extended Forecast for

South Lyme CT

  • Tonight

    Tonight: Partly cloudy, with a low around 24. Wind chill values between 15 and 20. West wind around 9 mph.

    Low: 24 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 36. Wind chill values between 15 and 25. Northwest wind 9 to 11 mph.

    High: 36 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 19. Northwest wind 5 to 7 mph.

    Low: 19 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 36. Wind chill values between 10 and 20. Northwest wind 5 to 7 mph.

    High: 36 °F

    Sunny

  • Friday Night

    Friday Night: A 20 percent chance of snow showers or flurries after 1am. Increasing clouds, with a low around 22. West wind around 5 mph.

    Low: 22 °F

    Partly Cloudy
    then Slight
    Chance Snow
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 40.

    High: 40 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 23.

    Low: 23 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 39.

    High: 39 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of snow after 1am. Mostly cloudy, with a low around 26.

    Low: 26 °F

    Mostly Cloudy
    then Chance
    Snow

Detailed Forecast

Tonight
Partly cloudy, with a low around 24. Wind chill values between 15 and 20. West wind around 9 mph.
Thursday
Sunny, with a high near 36. Wind chill values between 15 and 25. Northwest wind 9 to 11 mph.
Thursday Night
Mostly clear, with a low around 19. Northwest wind 5 to 7 mph.
Friday
Sunny, with a high near 36. Wind chill values between 10 and 20. Northwest wind 5 to 7 mph.
Friday Night
A 20 percent chance of snow showers or flurries after 1am. Increasing clouds, with a low around 22. West wind around 5 mph.
Saturday
Mostly sunny, with a high near 40.
Saturday Night
Partly cloudy, with a low around 23.
Sunday
Partly sunny, with a high near 39.
Sunday Night
A 30 percent chance of snow after 1am. Mostly cloudy, with a low around 26.
Washington's Birthday
A chance of rain and snow. Mostly cloudy, with a high near 40. Chance of precipitation is 30%.
Monday Night
Partly cloudy, with a low around 28.
Tuesday
Mostly sunny, with a high near 43.
Tuesday Night
Mostly cloudy, with a low around 29.
Wednesday
A 40 percent chance of rain. Cloudy, with a high near 43.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
South Lyme CT
 41.32°N 72.29°W (Elev. 98 ft)
Last Update:
12:37 pm EST Feb 11, 2026
Forecast Valid:
6pm EST Feb 11, 2026-6pm EST Feb 18, 2026
 
Forecast Discussion
 
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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