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

24°F

-4°C

Humidity 60%
Wind Speed NW 8 mph
Barometer 30.00 in (1015.9 mb)
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill15°F (-9°C)
Last update 13 Feb 12:56 am EST
Extended Forecast for

South Lyme CT

  • Overnight

    Overnight: Partly cloudy, with a low around 16. Northwest wind around 7 mph.

    Low: 16 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 36. Wind chill values between 10 and 20. Northwest wind 5 to 9 mph.

    High: 36 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Scattered snow showers after 1am. Increasing clouds, with a low around 21. West wind 3 to 5 mph. Chance of precipitation is 40%.

    Low: 21 °F

    Partly Cloudy
    then
    Scattered
    Snow Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 40. Wind chill values between 15 and 25. West wind 5 to 9 mph.

    High: 40 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 22. Northwest wind 3 to 5 mph.

    Low: 22 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 37.

    High: 37 °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 30.

    Low: 30 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 16. Northwest wind around 7 mph.
Friday
Mostly sunny, with a high near 36. Wind chill values between 10 and 20. Northwest wind 5 to 9 mph.
Friday Night
Scattered snow showers after 1am. Increasing clouds, with a low around 21. West wind 3 to 5 mph. Chance of precipitation is 40%.
Saturday
Mostly sunny, with a high near 40. Wind chill values between 15 and 25. West wind 5 to 9 mph.
Saturday Night
Mostly clear, with a low around 22. Northwest wind 3 to 5 mph.
Sunday
Mostly sunny, with a high near 37.
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 30.
Tuesday
Mostly sunny, with a high near 45.
Tuesday Night
Mostly cloudy, with a low around 31.
Wednesday
A 40 percent chance of rain. Cloudy, with a high near 45.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 32.
Thursday
A 40 percent chance of rain. Mostly cloudy, with a high near 43.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Lyme CT
 41.32°N 72.29°W (Elev. 98 ft)
Last Update:
1:30 am EST Feb 13, 2026
Forecast Valid:
1am EST Feb 13, 2026-6pm EST Feb 19, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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