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.

Overcast

33°F

1°C

Humidity 92%
Wind Speed Calm
Barometer 29.80 in (1009.2 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Last update 21 Feb 5:56 am EST
Extended Forecast for

South Lyme CT

Blizzard Warning February 22, 06:00am until February 23, 06:00pm
Click here for hazard details and duration
Blizzard Warning

  • Today

    Today: A slight chance of rain and snow after 4pm. Partly sunny, with a high near 42. Light and variable wind. Chance of precipitation is 20%.

    High: 42 °F

    Mostly Sunny
    then Slight
    Chance
    Rain/Snow

  • Tonight

    Tonight: A chance of rain and snow before 1am, then a slight chance of snow after 4am. Mostly cloudy, with a low around 27. Light east wind. Chance of precipitation is 30%.

    Low: 27 °F

    Chance
    Rain/Snow
    then Slight
    Chance Snow

  • Sunday

    Sunday: A 50 percent chance of snow, mainly after 7am. Mostly cloudy, with a high near 34. Wind chill values between 20 and 30. East wind 5 to 13 mph, with gusts as high as 24 mph.

    High: 34 °F

    Chance Snow

  • Sunday Night

    Sunday Night: Snow. The snow could be heavy at times. Areas of blowing snow after 1am. Low around 30. Wind chill values between 15 and 20. Blustery, with a northeast wind 15 to 25 mph, with gusts as high as 43 mph. Chance of precipitation is 90%. New snow accumulation of 5 to 9 inches possible.

    Low: 30 °F

    Heavy Snow
    and Areas
    Blowing Snow

  • Monday

    Monday: Snow. The snow could be heavy at times. Areas of blowing snow. High near 33. Windy, with a north wind 23 to 31 mph, with gusts as high as 47 mph. Chance of precipitation is 90%. New snow accumulation of 5 to 9 inches possible.

    High: 33 °F

    Heavy Snow
    and Areas
    Blowing Snow

  • Monday Night

    Monday Night: Cloudy, then gradually becoming partly cloudy, with a low around 22.

    Low: 22 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 33.

    High: 33 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 17.

    Low: 17 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of snow before 1pm, then a chance of rain. Mostly cloudy, with a high near 38. Chance of precipitation is 30%.

    High: 38 °F

    Chance Snow
    then Chance
    Rain/Snow

Detailed Forecast

Today
A slight chance of rain and snow after 4pm. Partly sunny, with a high near 42. Light and variable wind. Chance of precipitation is 20%.
Tonight
A chance of rain and snow before 1am, then a slight chance of snow after 4am. Mostly cloudy, with a low around 27. Light east wind. Chance of precipitation is 30%.
Sunday
A 50 percent chance of snow, mainly after 7am. Mostly cloudy, with a high near 34. Wind chill values between 20 and 30. East wind 5 to 13 mph, with gusts as high as 24 mph.
Sunday Night
Snow. The snow could be heavy at times. Areas of blowing snow after 1am. Low around 30. Wind chill values between 15 and 20. Blustery, with a northeast wind 15 to 25 mph, with gusts as high as 43 mph. Chance of precipitation is 90%. New snow accumulation of 5 to 9 inches possible.
Monday
Snow. The snow could be heavy at times. Areas of blowing snow. High near 33. Windy, with a north wind 23 to 31 mph, with gusts as high as 47 mph. Chance of precipitation is 90%. New snow accumulation of 5 to 9 inches possible.
Monday Night
Cloudy, then gradually becoming partly cloudy, with a low around 22.
Tuesday
Mostly sunny, with a high near 33.
Tuesday Night
Partly cloudy, with a low around 17.
Wednesday
A chance of snow before 1pm, then a chance of rain. Mostly cloudy, with a high near 38. Chance of precipitation is 30%.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 30.
Thursday
A 50 percent chance of rain. Mostly cloudy, with a high near 44.
Thursday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 29.
Friday
A 30 percent chance of rain. Mostly sunny, with a high near 42.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
South Lyme CT
 41.32°N 72.29°W (Elev. 98 ft)
Last Update:
3:41 am EST Feb 21, 2026
Forecast Valid:
6am EST Feb 21, 2026-6pm EST Feb 27, 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