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.

Fair

35°F

2°C

Humidity 59%
Wind Speed W 10 mph
Barometer 29.89 in (1012.1 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 12 Mar 9:56 pm EDT
Extended Forecast for

3 Miles SE Old Lyme CT

  • Tonight

    Tonight: A 20 percent chance of snow before 11pm. Mostly clear, with a low around 30. Wind chill values between 20 and 25. West wind 9 to 13 mph.

    Low: 30 °F

    Slight Chance
    Snow then
    Mostly Clear

  • Friday

    Friday: Increasing clouds, with a high near 45. Wind chill values between 25 and 35 early. West wind 6 to 13 mph becoming south in the afternoon.

    High: 45 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: A 20 percent chance of rain before 2am. Mostly cloudy, then gradually becoming mostly clear, with a low around 36. South wind around 14 mph, with gusts as high as 29 mph.

    Low: 36 °F

    Slight Chance
    Rain

  • Saturday

    Saturday: Sunny, with a high near 48. Breezy, with a west wind 17 to 20 mph, with gusts as high as 32 mph.

    High: 48 °F

    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 31. West wind 5 to 10 mph, with gusts as high as 21 mph.

    Low: 31 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy, with a high near 46.

    High: 46 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Rain likely after 2am. Cloudy, with a low around 38. Chance of precipitation is 70%.

    Low: 38 °F

    Cloudy then
    Rain Likely

  • Monday

    Monday: Rain and possibly a thunderstorm. High near 56. Breezy. Chance of precipitation is 100%.

    High: 56 °F

    Rain and
    Breezy

  • Monday Night

    Monday Night: Rain, mainly before 2am. Low around 37. Breezy. Chance of precipitation is 90%.

    Low: 37 °F

    Rain and
    Breezy

Detailed Forecast

Tonight
A 20 percent chance of snow before 11pm. Mostly clear, with a low around 30. Wind chill values between 20 and 25. West wind 9 to 13 mph.
Friday
Increasing clouds, with a high near 45. Wind chill values between 25 and 35 early. West wind 6 to 13 mph becoming south in the afternoon.
Friday Night
A 20 percent chance of rain before 2am. Mostly cloudy, then gradually becoming mostly clear, with a low around 36. South wind around 14 mph, with gusts as high as 29 mph.
Saturday
Sunny, with a high near 48. Breezy, with a west wind 17 to 20 mph, with gusts as high as 32 mph.
Saturday Night
Increasing clouds, with a low around 31. West wind 5 to 10 mph, with gusts as high as 21 mph.
Sunday
Mostly cloudy, with a high near 46.
Sunday Night
Rain likely after 2am. Cloudy, with a low around 38. Chance of precipitation is 70%.
Monday
Rain and possibly a thunderstorm. High near 56. Breezy. Chance of precipitation is 100%.
Monday Night
Rain, mainly before 2am. Low around 37. Breezy. Chance of precipitation is 90%.
Tuesday
A 30 percent chance of rain before 8am. Partly sunny, with a high near 45.
Tuesday Night
Partly cloudy, with a low around 25.
Wednesday
Sunny, with a high near 38.
Wednesday Night
Partly cloudy, with a low around 27.
Thursday
Mostly sunny, with a high near 42.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE Old Lyme CT
 41.28°N 72.3°W (Elev. 0 ft)
Last Update:
6:03 pm EDT Mar 12, 2026
Forecast Valid:
10pm EDT Mar 12, 2026-6pm EDT Mar 19, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation