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

36°F

2°C

Humidity 73%
Wind Speed W 5 mph
Barometer 29.89 in (1012.0 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 26 Feb 6:56 pm EST
Extended Forecast for

3 Miles SE South Lyme CT

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 24. North wind 3 to 6 mph.

    Low: 24 °F

    Decreasing
    Clouds

  • Friday

    Friday: Sunny, with a high near 38. Wind chill values between 20 and 30. Calm wind becoming south around 5 mph in the afternoon.

    High: 38 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 31. South wind 3 to 5 mph.

    Low: 31 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 44. South wind 5 to 7 mph.

    High: 44 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 30. Calm wind becoming north around 6 mph after midnight.

    Low: 30 °F

    Partly Cloudy

  • Sunday

    Sunday: A 30 percent chance of snow before 1pm. Partly sunny, with a high near 37.

    High: 37 °F

    Chance Snow

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 18.

    Low: 18 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 28.

    High: 28 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 19.

    Low: 19 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 24. North wind 3 to 6 mph.
Friday
Sunny, with a high near 38. Wind chill values between 20 and 30. Calm wind becoming south around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 31. South wind 3 to 5 mph.
Saturday
Mostly sunny, with a high near 44. South wind 5 to 7 mph.
Saturday Night
Partly cloudy, with a low around 30. Calm wind becoming north around 6 mph after midnight.
Sunday
A 30 percent chance of snow before 1pm. Partly sunny, with a high near 37.
Sunday Night
Mostly clear, with a low around 18.
Monday
Mostly sunny, with a high near 28.
Monday Night
Partly cloudy, with a low around 19.
Tuesday
Partly sunny, with a high near 37.
Tuesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 30.
Wednesday
A 40 percent chance of rain. Partly sunny, with a high near 44.
Wednesday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 31.
Thursday
A 30 percent chance of rain. Mostly cloudy, with a high near 44.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE South Lyme CT
 41.3°N 72.24°W (Elev. 0 ft)
Last Update:
12:59 pm EST Feb 26, 2026
Forecast Valid:
7pm EST Feb 26, 2026-6pm EST Mar 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