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

54°F

12°C

Humidity 87%
Wind Speed SE 10 mph
Barometer 29.81 in (1009.5 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Wind Chill51°F (11°C)
Last update 11 Mar 4:56 pm EDT
Extended Forecast for

3 Miles SE South Lyme CT

  • Tonight

    Tonight: A slight chance of showers before 11pm, then a chance of showers and thunderstorms between 11pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 41. Southwest wind 10 to 14 mph. Chance of precipitation is 50%.

    Low: 41 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers likely, mainly before 2pm. Cloudy, with a high near 52. Southwest wind 13 to 16 mph becoming northwest in the morning. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 52 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A 30 percent chance of showers before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 31. Wind chill values between 25 and 30. West wind 9 to 13 mph.

    Low: 31 °F

    Chance
    Showers then
    Mostly Clear

  • Friday

    Friday: Increasing clouds, with a high near 44. Wind chill values between 25 and 35. West wind 6 to 15 mph becoming south in the afternoon.

    High: 44 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 38. South wind 10 to 13 mph, with gusts as high as 25 mph.

    Low: 38 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny, with a high near 46. Breezy.

    High: 46 °F

    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 32.

    Low: 32 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 45.

    High: 45 °F

    Mostly Cloudy

  • Sunday Night

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

    Low: 38 °F

    Chance
    Showers then
    Showers
    Likely and
    Breezy

Detailed Forecast

Tonight
A slight chance of showers before 11pm, then a chance of showers and thunderstorms between 11pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 41. Southwest wind 10 to 14 mph. Chance of precipitation is 50%.
Thursday
Showers likely, mainly before 2pm. Cloudy, with a high near 52. Southwest wind 13 to 16 mph becoming northwest in the morning. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
A 30 percent chance of showers before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 31. Wind chill values between 25 and 30. West wind 9 to 13 mph.
Friday
Increasing clouds, with a high near 44. Wind chill values between 25 and 35. West wind 6 to 15 mph becoming south in the afternoon.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 38. South wind 10 to 13 mph, with gusts as high as 25 mph.
Saturday
Sunny, with a high near 46. Breezy.
Saturday Night
Partly cloudy, with a low around 32.
Sunday
Mostly cloudy, with a high near 45.
Sunday Night
Showers likely, mainly after 2am. Cloudy, with a low around 38. Breezy. Chance of precipitation is 70%.
Monday
Showers. High near 53. Breezy. Chance of precipitation is 90%.
Monday Night
Showers likely. Mostly cloudy, with a low around 32. Breezy. Chance of precipitation is 60%.
Tuesday
A 30 percent chance of showers. Mostly sunny, with a high near 39.
Tuesday Night
Mostly clear, with a low around 24.
Wednesday
Mostly sunny, with a high near 36.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE South Lyme CT
 41.3°N 72.24°W (Elev. 0 ft)
Last Update:
3:16 pm EDT Mar 11, 2026
Forecast Valid:
5pm EDT Mar 11, 2026-6pm EDT Mar 18, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation