National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

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

Lat: 41.33°NLon: 72.05°WElev: 10ft.

Overcast

32°F

0°C

Humidity 79%
Wind Speed N 5 mph
Barometer 29.92 in (1013.0 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 6 Dec 7:56 am EST
Extended Forecast for

South Lyme CT

  • Today

    Today: A chance of drizzle, snow, and freezing rain before 10am, then a chance of drizzle between 10am and 1pm. Mostly cloudy, with a high near 41. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 30%.

    High: 41 °F

    Chance Wintry
    Mix then
    Chance
    Drizzle

  • Tonight

    Tonight: Partly cloudy, with a low around 25. Calm wind.

    Low: 25 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 41. Calm wind becoming west around 5 mph.

    High: 41 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 22. Wind chill values between 15 and 20. Calm wind becoming northwest 5 to 9 mph after midnight. Winds could gust as high as 24 mph.

    Low: 22 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 31. North wind 9 to 15 mph, with gusts as high as 26 mph.

    High: 31 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 14.

    Low: 14 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 40.

    High: 40 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 30.

    Low: 30 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of rain after 1pm. Mostly cloudy, with a high near 48.

    High: 48 °F

    Mostly Cloudy
    then Chance
    Rain

Detailed Forecast

Today
A chance of drizzle, snow, and freezing rain before 10am, then a chance of drizzle between 10am and 1pm. Mostly cloudy, with a high near 41. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 30%.
Tonight
Partly cloudy, with a low around 25. Calm wind.
Sunday
Partly sunny, with a high near 41. Calm wind becoming west around 5 mph.
Sunday Night
Mostly cloudy, with a low around 22. Wind chill values between 15 and 20. Calm wind becoming northwest 5 to 9 mph after midnight. Winds could gust as high as 24 mph.
Monday
Mostly sunny, with a high near 31. North wind 9 to 15 mph, with gusts as high as 26 mph.
Monday Night
Partly cloudy, with a low around 14.
Tuesday
Increasing clouds, with a high near 40.
Tuesday Night
Mostly cloudy, with a low around 30.
Wednesday
A 30 percent chance of rain after 1pm. Mostly cloudy, with a high near 48.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 33.
Thursday
A 30 percent chance of rain. Partly sunny, with a high near 43.
Thursday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 24.
Friday
A chance of rain and snow. Partly sunny, with a high near 38. Chance of precipitation is 30%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Lyme CT
 41.33°N 72.32°W (Elev. 56 ft)
Last Update:
7:42 am EST Dec 6, 2025
Forecast Valid:
8am EST Dec 6, 2025-6pm EST Dec 12, 2025
 
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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