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.

Light Rain

40°F

4°C

Humidity 63%
Wind Speed NW 13 G 25 mph
Barometer 29.71 in (1006.2 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 11 Jan 5:56 pm EST
Extended Forecast for

South Lyme CT

  • Tonight

    Tonight: A slight chance of rain showers before 7pm, then a slight chance of snow showers between 7pm and 10pm. Mostly cloudy, then gradually becoming clear, with a low around 27. Wind chill values between 20 and 25. West wind 9 to 11 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.

    Low: 27 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Clear

  • Monday

    Monday: Sunny, with a high near 40. Wind chill values between 20 and 30. West wind 7 to 10 mph, with gusts as high as 25 mph.

    High: 40 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 30. West wind around 6 mph.

    Low: 30 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 43. Southwest wind 3 to 7 mph.

    High: 43 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a steady temperature around 38. South wind 3 to 6 mph. Winds could gust as high as 20 mph.

    Low: 38 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of rain before 1pm. Mostly cloudy, with a high near 47.

    High: 47 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain. Cloudy, with a low around 34.

    Low: 34 °F

    Chance Rain

  • Thursday

    Thursday: A 40 percent chance of rain. Mostly cloudy, with a high near 43.

    High: 43 °F

    Chance Rain

  • Thursday Night

    Thursday Night: A chance of rain before 1am, then a chance of snow. Mostly cloudy, with a low around 22. Chance of precipitation is 50%.

    Low: 22 °F

    Chance Rain
    then Chance
    Rain/Snow

Detailed Forecast

Tonight
A slight chance of rain showers before 7pm, then a slight chance of snow showers between 7pm and 10pm. Mostly cloudy, then gradually becoming clear, with a low around 27. Wind chill values between 20 and 25. West wind 9 to 11 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.
Monday
Sunny, with a high near 40. Wind chill values between 20 and 30. West wind 7 to 10 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around 30. West wind around 6 mph.
Tuesday
Sunny, with a high near 43. Southwest wind 3 to 7 mph.
Tuesday Night
Mostly cloudy, with a steady temperature around 38. South wind 3 to 6 mph. Winds could gust as high as 20 mph.
Wednesday
A 30 percent chance of rain before 1pm. Mostly cloudy, with a high near 47.
Wednesday Night
A 30 percent chance of rain. Cloudy, with a low around 34.
Thursday
A 40 percent chance of rain. Mostly cloudy, with a high near 43.
Thursday Night
A chance of rain before 1am, then a chance of snow. Mostly cloudy, with a low around 22. Chance of precipitation is 50%.
Friday
A 30 percent chance of snow before 1pm. Partly sunny, with a high near 34.
Friday Night
Partly cloudy, with a low around 23.
Saturday
Mostly sunny, with a high near 38.
Saturday Night
Partly cloudy, with a low around 26.
Sunday
A 40 percent chance of rain. Partly sunny, with a high near 37.
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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:
1:42 pm EST Jan 11, 2026
Forecast Valid:
6pm EST Jan 11, 2026-6pm EST Jan 18, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation