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

34°F

1°C

Humidity 48%
Wind Speed NW 13 G 23 mph
Barometer 29.89 in (1012.1 mb)
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 12 Feb 3:56 pm EST
Extended Forecast for

South Lyme CT

  • Tonight

    Tonight: Partly cloudy, with a low around 16. Northwest wind 3 to 6 mph. Winds could gust as high as 20 mph.

    Low: 16 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 35. Wind chill values between 15 and 25. Northwest wind 3 to 6 mph.

    High: 35 °F

    Sunny

  • Friday Night

    Friday Night: A 20 percent chance of snow showers after 1am. Partly cloudy, with a low around 21. Calm wind.

    Low: 21 °F

    Partly Cloudy
    then Slight
    Chance Snow
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 40. Wind chill values between 20 and 30. West wind 3 to 7 mph.

    High: 40 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 22. Calm wind.

    Low: 22 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 38.

    High: 38 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of snow after 1am. Mostly cloudy, with a low around 25.

    Low: 25 °F

    Mostly Cloudy
    then Chance
    Snow

  • Washington's Birthday

    Washington's Birthday: Partly sunny, with a high near 40.

    High: 40 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 16. Northwest wind 3 to 6 mph. Winds could gust as high as 20 mph.
Friday
Sunny, with a high near 35. Wind chill values between 15 and 25. Northwest wind 3 to 6 mph.
Friday Night
A 20 percent chance of snow showers after 1am. Partly cloudy, with a low around 21. Calm wind.
Saturday
Mostly sunny, with a high near 40. Wind chill values between 20 and 30. West wind 3 to 7 mph.
Saturday Night
Mostly clear, with a low around 22. Calm wind.
Sunday
Mostly sunny, with a high near 38.
Sunday Night
A 30 percent chance of snow after 1am. Mostly cloudy, with a low around 25.
Washington's Birthday
Partly sunny, with a high near 40.
Monday Night
Mostly cloudy, with a low around 29.
Tuesday
Partly sunny, with a high near 44.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
A 50 percent chance of rain. Cloudy, with a high near 44.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 33. Chance of precipitation is 60%.
Thursday
A 40 percent chance of rain. Mostly cloudy, with a high near 44.
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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:
3:41 pm EST Feb 12, 2026
Forecast Valid:
4pm EST Feb 12, 2026-6pm EST Feb 19, 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