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

37°F

3°C

Humidity 70%
Wind Speed W 7 mph
Barometer 29.87 in (1011.3 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 26 Feb 5:56 pm EST
Extended Forecast for

South Lyme CT

  • Tonight

    Tonight: A 20 percent chance of snow showers before 7pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 20. Calm wind.

    Low: 20 °F

    Slight Chance
    Snow Showers
    then Mostly
    Clear

  • Friday

    Friday: Sunny, with a high near 39. Wind chill values between 20 and 30. Light and variable wind.

    High: 39 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 28. Calm wind.

    Low: 28 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 45. Calm wind becoming south around 6 mph.

    High: 45 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 28. Light and variable wind.

    Low: 28 °F

    Partly Cloudy

  • Sunday

    Sunday: A 30 percent chance of snow before 1pm. Partly sunny, with a high near 37.

    High: 37 °F

    Chance Snow

  • Sunday Night

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

    Low: 15 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 28.

    High: 28 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 15.

    Low: 15 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 20 percent chance of snow showers before 7pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 20. Calm wind.
Friday
Sunny, with a high near 39. Wind chill values between 20 and 30. Light and variable wind.
Friday Night
Mostly clear, with a low around 28. Calm wind.
Saturday
Mostly sunny, with a high near 45. Calm wind becoming south around 6 mph.
Saturday Night
Partly cloudy, with a low around 28. Light and variable wind.
Sunday
A 30 percent chance of snow before 1pm. Partly sunny, with a high near 37.
Sunday Night
Mostly clear, with a low around 15.
Monday
Mostly sunny, with a high near 28.
Monday Night
Partly cloudy, with a low around 15.
Tuesday
Mostly sunny, with a high near 38.
Tuesday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 28.
Wednesday
A 40 percent chance of rain. Partly sunny, with a high near 46.
Wednesday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 30.
Thursday
A 30 percent chance of rain. Mostly cloudy, with a high near 46.
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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:
12:59 pm EST Feb 26, 2026
Forecast Valid:
6pm EST Feb 26, 2026-6pm EST Mar 5, 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