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

41°F

5°C

Humidity 79%
Wind Speed Calm
Barometer 29.90 in (1012.4 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Last update 6 Dec 10:56 am EST
Extended Forecast for

3 Miles SSE South Lyme CT

  • Today

    Today: A chance of drizzle before 1pm. Mostly cloudy, with a high near 41. West wind around 6 mph.

    High: 41 °F

    Chance
    Drizzle

  • Tonight

    Tonight: Partly cloudy, with a low around 27. West wind around 5 mph.

    Low: 27 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 41. Wind chill values between 20 and 30. Northwest wind around 6 mph becoming southwest in the afternoon.

    High: 41 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 23. Wind chill values between 15 and 20. Light and variable wind becoming northwest 8 to 13 mph in the evening. Winds could gust as high as 24 mph.

    Low: 23 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 32. North wind 10 to 16 mph, with gusts as high as 28 mph.

    High: 32 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 15.

    Low: 15 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 40.

    High: 40 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of rain after 1pm. Mostly cloudy, with a high near 48.

    High: 48 °F

    Mostly Cloudy
    then Chance
    Rain

Detailed Forecast

Today
A chance of drizzle before 1pm. Mostly cloudy, with a high near 41. West wind around 6 mph.
Tonight
Partly cloudy, with a low around 27. West wind around 5 mph.
Sunday
Partly sunny, with a high near 41. Wind chill values between 20 and 30. Northwest wind around 6 mph becoming southwest in the afternoon.
Sunday Night
Mostly cloudy, with a low around 23. Wind chill values between 15 and 20. Light and variable wind becoming northwest 8 to 13 mph in the evening. Winds could gust as high as 24 mph.
Monday
Mostly sunny, with a high near 32. North wind 10 to 16 mph, with gusts as high as 28 mph.
Monday Night
Partly cloudy, with a low around 15.
Tuesday
Increasing clouds, with a high near 40.
Tuesday Night
Mostly cloudy, with a low around 31.
Wednesday
A 30 percent chance of rain after 1pm. Mostly cloudy, with a high near 48.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 34.
Thursday
A 30 percent chance of rain. Partly sunny, with a high near 43.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 26. Chance of precipitation is 30%.
Friday
A chance of rain and snow. Partly sunny, with a high near 38. Chance of precipitation is 30%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE South Lyme CT
 41.3°N 72.27°W (Elev. 75 ft)
Last Update:
7:42 am EST Dec 6, 2025
Forecast Valid:
11am EST Dec 6, 2025-6pm EST Dec 12, 2025
 
Forecast Discussion
 
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Additional Resources

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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