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

24°F

-4°C

Humidity 88%
Wind Speed N 3 mph
Barometer 30.03 in (1016.8 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Last update 7 Dec 3:56 am EST
Extended Forecast for

3 Miles SSE South Lyme CT

  • Today

    Today: Increasing clouds, with a high near 42. Northwest wind around 6 mph becoming southwest in the afternoon.

    High: 42 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Partly cloudy, with a low around 25. Wind chill values between 15 and 20. Southwest wind 7 to 14 mph becoming northwest after midnight. Winds could gust as high as 28 mph.

    Low: 25 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 31. Wind chill values between 15 and 20. North wind 13 to 17 mph, with gusts as high as 31 mph.

    High: 31 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 17. Wind chill values between 10 and 15. North wind 5 to 10 mph.

    Low: 17 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 41. Light and variable wind becoming southwest 8 to 13 mph in the afternoon.

    High: 41 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of rain after 1pm. Mostly cloudy, with a high near 48.

    High: 48 °F

    Mostly Cloudy
    then Chance
    Rain

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain before 1am. Mostly cloudy, with a low around 37.

    Low: 37 °F

    Chance Rain

  • Thursday

    Thursday: Partly sunny, with a high near 43.

    High: 43 °F

    Partly Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 42. Northwest wind around 6 mph becoming southwest in the afternoon.
Tonight
Partly cloudy, with a low around 25. Wind chill values between 15 and 20. Southwest wind 7 to 14 mph becoming northwest after midnight. Winds could gust as high as 28 mph.
Monday
Mostly sunny, with a high near 31. Wind chill values between 15 and 20. North wind 13 to 17 mph, with gusts as high as 31 mph.
Monday Night
Partly cloudy, with a low around 17. Wind chill values between 10 and 15. North wind 5 to 10 mph.
Tuesday
Increasing clouds, with a high near 41. Light and variable wind becoming southwest 8 to 13 mph in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 34.
Wednesday
A 40 percent chance of rain after 1pm. Mostly cloudy, with a high near 48.
Wednesday Night
A 30 percent chance of rain before 1am. Mostly cloudy, with a low around 37.
Thursday
Partly sunny, with a high near 43.
Thursday Night
Mostly cloudy, with a low around 31.
Friday
A chance of rain and snow. Mostly cloudy, with a high near 40. Chance of precipitation is 40%.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 26. Chance of precipitation is 40%.
Saturday
A chance of rain and snow. Partly sunny, with a high near 34. Breezy. Chance of precipitation is 30%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE South Lyme CT
 41.28°N 72.27°W (Elev. 0 ft)
Last Update:
4:20 am EST Dec 7, 2025
Forecast Valid:
4am EST Dec 7, 2025-6pm EST Dec 13, 2025
 
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