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

12°F

-11°C

Humidity 84%
Wind Speed N 3 mph
Barometer 30.63 in (1037.1 mb)
Dewpoint 8°F (-13°C)
Visibility 10.00 mi
Last update 3 Mar 3:56 am EST
Extended Forecast for

2 Miles SSE South Lyme CT

  • Today

    Today: Rain, possibly mixed with snow, becoming all rain after 3pm. High near 39. Wind chill values between 25 and 30. Light southeast wind becoming east 5 to 9 mph in the morning. Chance of precipitation is 100%. Total daytime snow accumulation of less than a half inch possible.

    High: 39 °F

    Snow Likely
    then
    Rain/Snow

  • Tonight

    Tonight: Rain, mainly before 4am. Low around 34. East wind around 6 mph becoming west after midnight. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 34 °F

    Rain

  • Wednesday

    Wednesday: Mostly sunny, with a high near 48. Light and variable wind.

    High: 48 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 32. Calm wind.

    Low: 32 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Thursday

    Thursday: A 50 percent chance of rain. Cloudy, with a high near 44. Calm wind becoming east around 5 mph in the afternoon.

    High: 44 °F

    Chance Rain

  • Thursday Night

    Thursday Night: Rain likely. Cloudy, with a low around 36. Chance of precipitation is 60%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 36 °F

    Rain Likely

  • Friday

    Friday: A 50 percent chance of rain before 1pm. Mostly cloudy, with a high near 43.

    High: 43 °F

    Chance Rain

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

  • Saturday

    Saturday: Cloudy, with a high near 50.

    High: 50 °F

    Cloudy

Detailed Forecast

Today
Rain, possibly mixed with snow, becoming all rain after 3pm. High near 39. Wind chill values between 25 and 30. Light southeast wind becoming east 5 to 9 mph in the morning. Chance of precipitation is 100%. Total daytime snow accumulation of less than a half inch possible.
Tonight
Rain, mainly before 4am. Low around 34. East wind around 6 mph becoming west after midnight. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Wednesday
Mostly sunny, with a high near 48. Light and variable wind.
Wednesday Night
A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 32. Calm wind.
Thursday
A 50 percent chance of rain. Cloudy, with a high near 44. Calm wind becoming east around 5 mph in the afternoon.
Thursday Night
Rain likely. Cloudy, with a low around 36. Chance of precipitation is 60%. New precipitation amounts between a half and three quarters of an inch possible.
Friday
A 50 percent chance of rain before 1pm. Mostly cloudy, with a high near 43.
Friday Night
Mostly cloudy, with a low around 35.
Saturday
Cloudy, with a high near 50.
Saturday Night
Rain likely, mainly before 1am. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.
Sunday
Mostly cloudy, with a high near 55.
Sunday Night
Partly cloudy, with a low around 41.
Monday
Partly sunny, with a high near 57.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE South Lyme CT
 41.28°N 72.3°W (Elev. 0 ft)
Last Update:
4:19 am EST Mar 3, 2026
Forecast Valid:
4am EST Mar 3, 2026-6pm EDT Mar 9, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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