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

29°F

-2°C

Humidity 51%
Wind Speed W 5 mph
Barometer 30.15 in (1020.8 mb)
Dewpoint 13°F (-11°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 23 Jan 8:56 am EST
Extended Forecast for

South Lyme CT

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

  • Today

    Today: Mostly sunny, with a high near 33. Wind chill values between 20 and 25. West wind 9 to 11 mph, with gusts as high as 24 mph.

    High: 33 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 5. Wind chill values between -5 and 5. Northwest wind around 9 mph, with gusts as high as 24 mph.

    Low: 5 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny and cold, with a high near 16. Wind chill values between -10 and zero. Northwest wind 7 to 10 mph, with gusts as high as 23 mph.

    High: 16 °F

    Cold

  • Saturday Night

    Saturday Night: A 20 percent chance of snow after 1am. Mostly cloudy, with a low around 8. Northwest wind around 5 mph becoming calm in the evening.

    Low: 8 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Sunday

    Sunday: Snow. The snow could be heavy at times. High near 26. Light northeast wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.

    High: 26 °F

    Heavy Snow

  • Sunday Night

    Sunday Night: Snow. Temperature falling to near 22 by 10pm, then rising to around 26 during the remainder of the night. Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.

    Low: 22 °F⇑

    Snow

  • Monday

    Monday: Snow. High near 29. Chance of precipitation is 80%.

    High: 29 °F

    Snow

  • Monday Night

    Monday Night: A 30 percent chance of snow before 1am. Mostly cloudy, with a low around 10.

    Low: 10 °F

    Chance Snow

  • Tuesday

    Tuesday: Mostly sunny, with a high near 23.

    High: 23 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 33. Wind chill values between 20 and 25. West wind 9 to 11 mph, with gusts as high as 24 mph.
Tonight
Mostly clear, with a low around 5. Wind chill values between -5 and 5. Northwest wind around 9 mph, with gusts as high as 24 mph.
Saturday
Mostly sunny and cold, with a high near 16. Wind chill values between -10 and zero. Northwest wind 7 to 10 mph, with gusts as high as 23 mph.
Saturday Night
A 20 percent chance of snow after 1am. Mostly cloudy, with a low around 8. Northwest wind around 5 mph becoming calm in the evening.
Sunday
Snow. The snow could be heavy at times. High near 26. Light northeast wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.
Sunday Night
Snow. Temperature falling to near 22 by 10pm, then rising to around 26 during the remainder of the night. Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.
Monday
Snow. High near 29. Chance of precipitation is 80%.
Monday Night
A 30 percent chance of snow before 1am. Mostly cloudy, with a low around 10.
Tuesday
Mostly sunny, with a high near 23.
Tuesday Night
Partly cloudy, with a low around 9.
Wednesday
Mostly sunny, with a high near 24.
Wednesday Night
Partly cloudy, with a low around 9.
Thursday
Partly sunny, with a high near 23.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Lyme CT
 41.35°N 72.29°W (Elev. 98 ft)
Last Update:
2:28 am EST Jan 23, 2026
Forecast Valid:
9am EST Jan 23, 2026-6pm EST Jan 29, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation