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

38°F

3°C

Humidity 55%
Wind Speed N 16 mph
Barometer 30.34 in (1027.5 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 24 Mar 9:56 am EDT
Extended Forecast for

3 Miles SE South Lyme CT

  • Today

    Today: Sunny, with a high near 44. West wind 5 to 13 mph.

    High: 44 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 35. Southwest wind 7 to 9 mph.

    Low: 35 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Partly sunny, with a high near 46. Light west wind becoming southwest 5 to 9 mph in the afternoon.

    High: 46 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Cloudy, with a low around 40. South wind 6 to 8 mph.

    Low: 40 °F

    Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 53. Southwest wind 8 to 15 mph.

    High: 53 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Rain likely, mainly after 2am. Mostly cloudy, with a low around 46. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 46 °F

    Chance Rain
    then Rain
    Likely

  • Friday

    Friday: Rain likely, mainly before 8am. Partly sunny, with a high near 48. Chance of precipitation is 60%.

    High: 48 °F

    Rain Likely
    then Chance
    Rain

  • Friday Night

    Friday Night: Partly cloudy, with a low around 27.

    Low: 27 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 39.

    High: 39 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 44. West wind 5 to 13 mph.
Tonight
Increasing clouds, with a low around 35. Southwest wind 7 to 9 mph.
Wednesday
Partly sunny, with a high near 46. Light west wind becoming southwest 5 to 9 mph in the afternoon.
Wednesday Night
Cloudy, with a low around 40. South wind 6 to 8 mph.
Thursday
Mostly cloudy, with a high near 53. Southwest wind 8 to 15 mph.
Thursday Night
Rain likely, mainly after 2am. Mostly cloudy, with a low around 46. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Rain likely, mainly before 8am. Partly sunny, with a high near 48. Chance of precipitation is 60%.
Friday Night
Partly cloudy, with a low around 27.
Saturday
Sunny, with a high near 39.
Saturday Night
Mostly clear, with a low around 31.
Sunday
Sunny, with a high near 45.
Sunday Night
Partly cloudy, with a low around 36.
Monday
Mostly sunny, with a high near 50.
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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:
3:49 am EDT Mar 24, 2026
Forecast Valid:
10am EDT Mar 24, 2026-6pm EDT Mar 30, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation