Current conditions at

Groton / New London, Groton / New London Airport (KGON)

Lat: 41.33°NLon: 72.05°WElev: 10ft.

Overcast

35°F

2°C

Humidity 82%
Wind Speed SE 3 mph
Barometer 30.10 in (1019.1 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 19 Feb 8:56 pm EST
Extended Forecast for

South Lyme CT

  • Tonight

    Tonight: Partly cloudy, with a low around 29. East wind around 5 mph becoming calm  after midnight.

    Low: 29 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of snow before 8am, then rain.  High near 38. Light east wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 21 mph.  Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 38 °F

    Rain/Snow
    then Rain

  • Friday Night

    Friday Night: Rain likely before midnight, then a chance of rain and snow.  Cloudy, with a low around 30. Northeast wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 30 °F

    Rain Likely
    then Chance
    Rain/Snow

  • Saturday

    Saturday: A slight chance of rain and snow before noon, then a chance of rain between noon and 4pm, then a chance of rain and snow after 4pm.  Mostly cloudy, with a high near 40. Calm wind becoming east around 5 mph.  Chance of precipitation is 30%.

    High: 40 °F

    Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: A 30 percent chance of snow, mainly before 1am.  Mostly cloudy, with a low around 27. Light east wind.

    Low: 27 °F

    Chance Snow

  • Sunday

    Sunday: A 40 percent chance of snow after 1pm.  Mostly cloudy, with a high near 36.

    High: 36 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday Night

    Sunday Night: Snow likely.  Cloudy, with a low around 27. Chance of precipitation is 60%.

    Low: 27 °F

    Snow Likely

  • Monday

    Monday: A 50 percent chance of snow.  Mostly cloudy, with a high near 35. Breezy.

    High: 35 °F

    Chance Snow
    and Breezy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 22.

    Low: 22 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 29. East wind around 5 mph becoming calm after midnight.
Friday
A slight chance of snow before 8am, then rain. High near 38. Light east wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Friday Night
Rain likely before midnight, then a chance of rain and snow. Cloudy, with a low around 30. Northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%. Little or no snow accumulation expected.
Saturday
A slight chance of rain and snow before noon, then a chance of rain between noon and 4pm, then a chance of rain and snow after 4pm. Mostly cloudy, with a high near 40. Calm wind becoming east around 5 mph. Chance of precipitation is 30%.
Saturday Night
A 30 percent chance of snow, mainly before 1am. Mostly cloudy, with a low around 27. Light east wind.
Sunday
A 40 percent chance of snow after 1pm. Mostly cloudy, with a high near 36.
Sunday Night
Snow likely. Cloudy, with a low around 27. Chance of precipitation is 60%.
Monday
A 50 percent chance of snow. Mostly cloudy, with a high near 35. Breezy.
Monday Night
Mostly cloudy, with a low around 22.
Tuesday
Mostly sunny, with a high near 36.
Tuesday Night
Partly cloudy, with a low around 18.
Wednesday
A 30 percent chance of rain. Mostly cloudy, with a high near 41.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 33.
Thursday
A 40 percent chance of rain. Mostly cloudy, with a high near 45.
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ABOUT THIS FORECAST

 
Point Forecast:
South Lyme CT
 41.32°N 72.29°W (Elev. 98 ft)
3:51 pm EST Feb 19, 2026
9pm EST Feb 19, 2026-6pm EST Feb 26, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database