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

52°F

11°C

Humidity 61%
Wind Speed NW 12 mph
Barometer 29.86 in (1011.0 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 9 Nov 6:56 pm EST
Extended Forecast for

South Lyme CT

  • Tonight

    Tonight: Mostly clear, with a low around 36. West wind 5 to 8 mph, with gusts as high as 21 mph.

    Low: 36 °F

    Mostly Clear

  • Tuesday

    Tuesday: Patchy frost before 7am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 59. Southwest wind 5 to 10 mph, with gusts as high as 21 mph.

    High: 59 °F

    Patchy Frost
    then Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 40. West wind around 6 mph.

    Low: 40 °F

    Mostly Clear

  • Veterans Day

    Veterans Day: Sunny, with a high near 59. Northwest wind 3 to 7 mph.

    High: 59 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 38. Calm wind.

    Low: 38 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 40 percent chance of rain after 1pm. Mostly cloudy, with a high near 59.

    High: 59 °F

    Mostly Cloudy
    then Chance
    Rain

  • Thursday Night

    Thursday Night: Rain likely. Cloudy, with a low around 37. Chance of precipitation is 70%.

    Low: 37 °F

    Rain Likely

  • Friday

    Friday: Rain likely. Mostly cloudy, with a high near 48. Chance of precipitation is 60%.

    High: 48 °F

    Rain Likely

  • Friday Night

    Friday Night: A chance of rain before 1am, then a chance of rain and snow. Mostly cloudy, with a low around 30. Chance of precipitation is 30%.

    Low: 30 °F

    Chance Rain
    then Chance
    Rain/Snow

Detailed Forecast

Tonight
Mostly clear, with a low around 36. West wind 5 to 8 mph, with gusts as high as 21 mph.
Tuesday
Patchy frost before 7am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 59. Southwest wind 5 to 10 mph, with gusts as high as 21 mph.
Tuesday Night
Mostly clear, with a low around 40. West wind around 6 mph.
Veterans Day
Sunny, with a high near 59. Northwest wind 3 to 7 mph.
Wednesday Night
Mostly cloudy, with a low around 38. Calm wind.
Thursday
A 40 percent chance of rain after 1pm. Mostly cloudy, with a high near 59.
Thursday Night
Rain likely. Cloudy, with a low around 37. Chance of precipitation is 70%.
Friday
Rain likely. Mostly cloudy, with a high near 48. Chance of precipitation is 60%.
Friday Night
A chance of rain before 1am, then a chance of rain and snow. Mostly cloudy, with a low around 30. Chance of precipitation is 30%.
Saturday
Mostly cloudy, with a high near 48.
Saturday Night
Partly cloudy, with a low around 30.
Sunday
Mostly sunny, with a high near 51.
Sunday Night
Partly cloudy, with a low around 30.
Monday
Sunny, with a high near 55.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
South Lyme CT
 41.35°N 72.29°W (Elev. 98 ft)
Last Update:
1:27 pm EST Nov 9, 2026
Forecast Valid:
7pm EST Nov 9, 2026-6pm EST Nov 16, 2026
 
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Additional Resources

Radar & Satellite Image

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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