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

15°F

-9°C

Humidity 56%
Wind Speed NW 12 G 20 mph
Barometer 30.07 in (1018.1 mb)
Dewpoint 2°F (-17°C)
Visibility 10.00 mi
Wind Chill1°F (-17°C)
Last update 29 Jan 10:56 pm EST
Extended Forecast for

South Lyme CT

Cold Weather Advisory January 30, 12:00am until January 30, 10:00am
Click here for hazard details and duration
Cold Weather Advisory

  • Tonight

    Tonight: Mostly clear, with a low around 5. Wind chill values between -5 and zero. Northwest wind around 6 mph, with gusts as high as 20 mph.

    Low: 5 °F

    Mostly Clear

  • Friday

    Friday: Sunny and cold, with a high near 17. Wind chill values between -5 and 5. West wind 6 to 10 mph, with gusts as high as 22 mph.

    High: 17 °F

    Cold

  • Friday Night

    Friday Night: Mostly clear, with a low around 5. Wind chill values between zero and 5. Northwest wind 3 to 5 mph.

    Low: 5 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 22. Wind chill values between zero and 10. North wind 3 to 5 mph.

    High: 22 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of snow after 1am. Mostly cloudy, with a low around 10. Light north wind increasing to 8 to 13 mph in the evening. Winds could gust as high as 28 mph.

    Low: 10 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: A 50 percent chance of snow. Cloudy, with a high near 26.

    High: 26 °F

    Chance Snow

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 15.

    Low: 15 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 33.

    High: 33 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 16.

    Low: 16 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 5. Wind chill values between -5 and zero. Northwest wind around 6 mph, with gusts as high as 20 mph.
Friday
Sunny and cold, with a high near 17. Wind chill values between -5 and 5. West wind 6 to 10 mph, with gusts as high as 22 mph.
Friday Night
Mostly clear, with a low around 5. Wind chill values between zero and 5. Northwest wind 3 to 5 mph.
Saturday
Mostly sunny, with a high near 22. Wind chill values between zero and 10. North wind 3 to 5 mph.
Saturday Night
A 30 percent chance of snow after 1am. Mostly cloudy, with a low around 10. Light north wind increasing to 8 to 13 mph in the evening. Winds could gust as high as 28 mph.
Sunday
A 50 percent chance of snow. Cloudy, with a high near 26.
Sunday Night
Mostly cloudy, with a low around 15.
Monday
Mostly sunny, with a high near 33.
Monday Night
Mostly clear, with a low around 16.
Tuesday
Mostly sunny, with a high near 33.
Tuesday Night
Partly cloudy, with a low around 15.
Wednesday
Mostly sunny, with a high near 30.
Wednesday Night
Partly cloudy, with a low around 12.
Thursday
A 30 percent chance of snow. Partly sunny, with a high near 30.
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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:
1:13 pm EST Jan 29, 2026
Forecast Valid:
11pm EST Jan 29, 2026-6pm EST Feb 5, 2026
 
Forecast Discussion
 
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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