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

14°F

-10°C

Humidity 38%
Wind Speed NW 20 G 29 mph
Barometer 30.01 in (1016.0 mb)
Dewpoint -7°F (-22°C)
Visibility 10.00 mi
Wind Chill-4°F (-20°C)
Last update 8 Feb 1:56 pm EST
Extended Forecast for

South Lyme CT

Cold Weather Advisory until February 9, 10:00am
Click here for hazard details and duration
Cold Weather Advisory
  •  
    Cold Weather Advisory until February 9, 10:00am

    NOW until 10:00am Mon

    Cold Weather Advisory

  • This Afternoon

    High: 17 °F

    Cold

  • Tonight

    Tonight: Mostly clear, with a low around 5. Wind chill values between -5 and zero. Northwest wind 6 to 9 mph, with gusts as high as 26 mph.

    Low: 5 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 29. Wind chill values between -5 and 5. Northwest wind 6 to 8 mph.

    High: 29 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 13. Light northwest wind.

    Low: 13 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of snow after 1pm. Increasing clouds, with a high near 35. Calm wind becoming southwest around 5 mph.

    High: 35 °F

    Partly Sunny
    then Chance
    Snow

  • Tuesday Night

    Tuesday Night: A 40 percent chance of snow before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 24.

    Low: 24 °F

    Chance Snow

  • Wednesday

    Wednesday: Mostly sunny, with a high near 37.

    High: 37 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 20.

    Low: 20 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
Sunny and cold, with a high near 17. Wind chill values between zero and 5. Northwest wind around 11 mph, with gusts as high as 26 mph.
Tonight
Mostly clear, with a low around 5. Wind chill values between -5 and zero. Northwest wind 6 to 9 mph, with gusts as high as 26 mph.
Monday
Sunny, with a high near 29. Wind chill values between -5 and 5. Northwest wind 6 to 8 mph.
Monday Night
Partly cloudy, with a low around 13. Light northwest wind.
Tuesday
A 30 percent chance of snow after 1pm. Increasing clouds, with a high near 35. Calm wind becoming southwest around 5 mph.
Tuesday Night
A 40 percent chance of snow before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 24.
Wednesday
Mostly sunny, with a high near 37.
Wednesday Night
Partly cloudy, with a low around 20.
Thursday
Mostly sunny, with a high near 34.
Thursday Night
Partly cloudy, with a low around 16.
Friday
Mostly sunny, with a high near 34.
Friday Night
Partly cloudy, with a low around 17.
Saturday
Sunny, with a high near 36.
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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:
12:55 pm EST Feb 8, 2026
Forecast Valid:
2pm EST Feb 8, 2026-6pm EST Feb 14, 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