National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Groton / New London, Groton / New London Airport (KGON)

Lat: 41.33°NLon: 72.05°WElev: 10ft.

Fair

26°F

-3°C

Humidity 96%
Wind Speed Calm
Barometer 29.80 in (1009.2 mb)
Dewpoint 25°F (-4°C)
Visibility 8.00 mi
Last update 26 Feb 5:56 am EST
Extended Forecast for

South Lyme CT

  • Today

    Today: Increasing clouds, with a high near 40. Calm wind becoming west around 5 mph.

    High: 40 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 19. Calm wind.

    Low: 19 °F

    Decreasing
    Clouds

  • Friday

    Friday: Sunny, with a high near 39. Wind chill values between 20 and 30. Calm wind becoming south around 5 mph.

    High: 39 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 27. Calm wind.

    Low: 27 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 47. Calm wind becoming southwest around 6 mph.

    High: 47 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 28.

    Low: 28 °F

    Partly Cloudy

  • Sunday

    Sunday: A 30 percent chance of snow showers before 1pm. Cloudy, then gradual clearing during the afternoon, with a high near 37.

    High: 37 °F

    Chance Snow
    Showers

  • Sunday Night

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

    Low: 15 °F

    Partly Cloudy

  • Monday

    Monday: A 30 percent chance of snow after 1pm. Partly sunny, with a high near 28.

    High: 28 °F

    Partly Sunny
    then Chance
    Snow

Detailed Forecast

Today
Increasing clouds, with a high near 40. Calm wind becoming west around 5 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 19. Calm wind.
Friday
Sunny, with a high near 39. Wind chill values between 20 and 30. Calm wind becoming south around 5 mph.
Friday Night
Mostly clear, with a low around 27. Calm wind.
Saturday
Sunny, with a high near 47. Calm wind becoming southwest around 6 mph.
Saturday Night
Partly cloudy, with a low around 28.
Sunday
A 30 percent chance of snow showers before 1pm. Cloudy, then gradual clearing during the afternoon, with a high near 37.
Sunday Night
Partly cloudy, with a low around 15.
Monday
A 30 percent chance of snow after 1pm. Partly sunny, with a high near 28.
Monday Night
Mostly cloudy, with a low around 15.
Tuesday
Mostly cloudy, with a high near 37.
Tuesday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 27.
Wednesday
A 50 percent chance of rain. Mostly sunny, 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:
6:03 am EST Feb 26, 2026
Forecast Valid:
6am EST Feb 26, 2026-6pm EST Mar 4, 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