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

12°F

-11°C

Humidity 19%
Wind Speed NW 20 G 28 mph
Barometer 30.59 in (1035.7 mb)
Dewpoint -22°F (-30°C)
Visibility 10.00 mi
Wind Chill-6°F (-21°C)
Last update 24 Jan 11:56 am EST
Extended Forecast for

South Lyme CT

Winter Storm Warning January 25, 03:00am until January 26, 06:00pm
Click here for hazard details and duration
Winter Storm Warning

  • This Afternoon

    This Afternoon: Mostly sunny and cold, with a high near 16. Wind chill values between zero and 5. Northwest wind 6 to 9 mph, with gusts as high as 21 mph.

    High: 16 °F

    Cold

  • Tonight

    Tonight: A 20 percent chance of snow after 4am. Increasing clouds, with a low around 8. Light northwest wind.

    Low: 8 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Sunday

    Sunday: Snow, mainly after 7am. The snow could be heavy at times. High near 30. Wind chill values between 5 and 15. Light northeast wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 100%. New snow accumulation of 6 to 10 inches possible.

    High: 30 °F

    Heavy Snow

  • Sunday Night

    Sunday Night: Snow. The snow could be heavy at times. Low around 20. Northeast wind 8 to 10 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.

    Low: 20 °F

    Heavy Snow

  • Monday

    Monday: Snow, mainly before 1pm. High near 31. Northeast wind 7 to 9 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    High: 31 °F

    Snow

  • Monday Night

    Monday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 10.

    Low: 10 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 22.

    High: 22 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 9.

    Low: 9 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 24.

    High: 24 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny and cold, with a high near 16. Wind chill values between zero and 5. Northwest wind 6 to 9 mph, with gusts as high as 21 mph.
Tonight
A 20 percent chance of snow after 4am. Increasing clouds, with a low around 8. Light northwest wind.
Sunday
Snow, mainly after 7am. The snow could be heavy at times. High near 30. Wind chill values between 5 and 15. Light northeast wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 23 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. Low around 20. Northeast wind 8 to 10 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.
Monday
Snow, mainly before 1pm. High near 31. Northeast wind 7 to 9 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Monday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 10.
Tuesday
Mostly sunny, with a high near 22.
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 8.
Thursday
Partly sunny, with a high near 22.
Thursday Night
Partly cloudy, with a low around 6.
Friday
Mostly 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:
1:05 am EST Jan 24, 2026
Forecast Valid:
12pm EST Jan 24, 2026-6pm EST Jan 30, 2026
 
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Additional Resources

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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