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 and Breezy

34°F

1°C

Humidity 40%
Wind Speed W 22 G 35 mph
Barometer 30.07 in (1018.0 mb)
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill22°F (-6°C)
Last update 23 Jan 12:56 pm EST
Extended Forecast for

South Lyme CT

Cold Weather Advisory January 23, 10:00pm until January 24, 12:00pm
Winter Storm Warning January 25, 03:00am until January 26, 06:00pm
Click here for hazard details and duration
Cold Weather Advisory
Winter Storm Warning

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 38. Wind chill values between 25 and 30. West wind around 14 mph, with gusts as high as 24 mph.

    High: 38 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 6. Wind chill values between -5 and 5. Northwest wind 13 to 15 mph.

    Low: 6 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Mostly sunny and cold, with a high near 16. Wind chill values between -10 and zero. Northwest wind 7 to 14 mph.

    High: 16 °F

    Cold

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 9. Light north wind.

    Low: 9 °F

    Mostly Cloudy

  • Sunday

    Sunday: Snow. The snow could be heavy at times. High near 29. Light northeast wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 24 mph. Chance of precipitation is 100%. New snow accumulation of 6 to 10 inches possible.

    High: 29 °F

    Heavy Snow

  • Sunday Night

    Sunday Night: Snow. The snow could be heavy at times. Temperature falling to near 24 by 9pm, then rising to around 28 during the remainder of the night. Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.

    Low: 24 °F⇑

    Heavy Snow

  • Monday

    Monday: Snow likely, mainly before 1pm. Cloudy, with a high near 31. Chance of precipitation is 60%.

    High: 31 °F

    Snow Likely

  • Monday Night

    Monday Night: A 30 percent chance of snow before 1am. Partly cloudy, with a low around 11.

    Low: 11 °F

    Chance Snow

  • Tuesday

    Tuesday: Mostly sunny, with a high near 23.

    High: 23 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 38. Wind chill values between 25 and 30. West wind around 14 mph, with gusts as high as 24 mph.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around 6. Wind chill values between -5 and 5. Northwest wind 13 to 15 mph.
Saturday
Mostly sunny and cold, with a high near 16. Wind chill values between -10 and zero. Northwest wind 7 to 14 mph.
Saturday Night
Mostly cloudy, with a low around 9. Light north wind.
Sunday
Snow. The snow could be heavy at times. High near 29. Light northeast wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 24 mph. Chance of precipitation is 100%. New snow accumulation of 6 to 10 inches possible.
Sunday Night
Snow. The snow could be heavy at times. Temperature falling to near 24 by 9pm, then rising to around 28 during the remainder of the night. Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.
Monday
Snow likely, mainly before 1pm. Cloudy, with a high near 31. Chance of precipitation is 60%.
Monday Night
A 30 percent chance of snow before 1am. Partly cloudy, with a low around 11.
Tuesday
Mostly sunny, with a high near 23.
Tuesday Night
Partly cloudy, with a low around 8.
Wednesday
Sunny, with a high near 24.
Wednesday Night
Mostly cloudy, with a low around 8.
Thursday
Partly sunny, with a high near 23.
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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:
12:58 pm EST Jan 23, 2026
Forecast Valid:
1pm EST Jan 23, 2026-6pm EST Jan 29, 2026
 
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Additional Resources

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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