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.

Partly Cloudy

31°F

-1°C

Humidity 76%
Wind Speed W 10 mph
Barometer 29.88 in (1011.8 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill22°F (-6°C)
Last update 19 Jan 11:56 am EST
Extended Forecast for

South Lyme CT

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 32. Wind chill values between 20 and 25. West wind 11 to 13 mph, with gusts as high as 25 mph.

    High: 32 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 16. Wind chill values between 10 and 15. West wind around 9 mph, with gusts as high as 28 mph.

    Low: 16 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 24. Wind chill values between 10 and 15. West wind 7 to 11 mph, with gusts as high as 24 mph.

    High: 24 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 12. West wind 3 to 6 mph. Winds could gust as high as 20 mph.

    Low: 12 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 38. Calm wind becoming southwest 5 to 9 mph in the morning.

    High: 38 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 40.

    High: 40 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 21.

    Low: 21 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 30.

    High: 30 °F

    Mostly Sunny

Detailed Forecast

M.L.King Day
Mostly sunny, with a high near 32. Wind chill values between 20 and 25. West wind 11 to 13 mph, with gusts as high as 25 mph.
Tonight
Mostly clear, with a low around 16. Wind chill values between 10 and 15. West wind around 9 mph, with gusts as high as 28 mph.
Tuesday
Sunny, with a high near 24. Wind chill values between 10 and 15. West wind 7 to 11 mph, with gusts as high as 24 mph.
Tuesday Night
Mostly clear, with a low around 12. West wind 3 to 6 mph. Winds could gust as high as 20 mph.
Wednesday
Mostly sunny, with a high near 38. Calm wind becoming southwest 5 to 9 mph in the morning.
Wednesday Night
Mostly cloudy, with a low around 28.
Thursday
Mostly sunny, with a high near 40.
Thursday Night
Partly cloudy, with a low around 21.
Friday
Mostly sunny, with a high near 30.
Friday Night
Mostly cloudy, with a low around 9.
Saturday
Mostly sunny and cold, with a high near 19.
Saturday Night
Partly cloudy, with a low around 3.
Sunday
Mostly sunny and cold, with a high near 19.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
South Lyme CT
 41.32°N 72.29°W (Elev. 98 ft)
Last Update:
9:44 am EST Jan 19, 2026
Forecast Valid:
12pm EST Jan 19, 2026-6pm EST Jan 25, 2026
 
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Additional Resources

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