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

31°F

-1°C

Humidity 59%
Wind Speed NW 8 mph
Barometer 30.00 in (1015.9 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 13 Mar 4:56 am EDT
Extended Forecast for

3 Miles SE South Lyme CT

  • Today

    Today: Increasing clouds, with a high near 44. West wind 7 to 11 mph becoming southwest in the afternoon.

    High: 44 °F

    Increasing
    Clouds

  • Tonight

    Tonight: A 30 percent chance of rain, mainly between 11pm and 2am. Cloudy during the early evening, then gradual clearing, with a low around 37. Breezy, with a south wind 15 to 21 mph.

    Low: 37 °F

    Chance Rain
    and Breezy

  • Saturday

    Saturday: Mostly sunny, with a high near 46. Breezy, with a west wind 21 to 23 mph, with gusts as high as 34 mph.

    High: 46 °F

    Mostly Sunny
    and Breezy

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 31. Wind chill values between 25 and 30. West wind 9 to 17 mph.

    Low: 31 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy, with a high near 44. Northeast wind 6 to 11 mph becoming southeast in the afternoon.

    High: 44 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Rain likely, mainly after 5am. Mostly cloudy, with a low around 38. Breezy. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 38 °F

    Mostly Cloudy
    then Rain
    Likely and
    Breezy

  • Monday

    Monday: Rain and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 55. Windy. Chance of precipitation is 100%.

    High: 55 °F

    Heavy Rain
    and Windy

  • Monday Night

    Monday Night: Rain. Low around 41. Windy. Chance of precipitation is 90%.

    Low: 41 °F

    Rain and
    Windy

  • Tuesday

    Tuesday: Rain likely, mainly before 8am. Partly sunny, with a high near 46. Chance of precipitation is 60%.

    High: 46 °F

    Rain Likely
    then Chance
    Rain

Detailed Forecast

Today
Increasing clouds, with a high near 44. West wind 7 to 11 mph becoming southwest in the afternoon.
Tonight
A 30 percent chance of rain, mainly between 11pm and 2am. Cloudy during the early evening, then gradual clearing, with a low around 37. Breezy, with a south wind 15 to 21 mph.
Saturday
Mostly sunny, with a high near 46. Breezy, with a west wind 21 to 23 mph, with gusts as high as 34 mph.
Saturday Night
Increasing clouds, with a low around 31. Wind chill values between 25 and 30. West wind 9 to 17 mph.
Sunday
Mostly cloudy, with a high near 44. Northeast wind 6 to 11 mph becoming southeast in the afternoon.
Sunday Night
Rain likely, mainly after 5am. Mostly cloudy, with a low around 38. Breezy. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Rain and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 55. Windy. Chance of precipitation is 100%.
Monday Night
Rain. Low around 41. Windy. Chance of precipitation is 90%.
Tuesday
Rain likely, mainly before 8am. Partly sunny, with a high near 46. Chance of precipitation is 60%.
Tuesday Night
Partly cloudy, with a low around 25.
Wednesday
Sunny, with a high near 38.
Wednesday Night
Mostly cloudy, with a low around 29.
Thursday
Mostly cloudy, with a high near 42.
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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:
3:05 am EDT Mar 13, 2026
Forecast Valid:
5am EDT Mar 13, 2026-6pm EDT Mar 19, 2026
 
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Additional Resources

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Chance of Precipitation