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

54°F

12°C

Humidity 75%
Wind Speed NW 14 G 23 mph
Barometer 29.73 in (1006.5 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 7 Nov 6:56 pm EST
Extended Forecast for

South Lyme CT

  • Tonight

    Tonight: A chance of showers between 10pm and 4am. Mostly cloudy, with a low around 43. Northwest wind 11 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.

    Low: 43 °F

    Chance
    Showers

  • Sunday

    Sunday: Sunny, with a high near 62. West wind 10 to 16 mph, with gusts as high as 29 mph.

    High: 62 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 41. West wind 8 to 11 mph, with gusts as high as 21 mph.

    Low: 41 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 60. West wind 10 to 14 mph, with gusts as high as 25 mph.

    High: 60 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 37. West wind 6 to 8 mph, with gusts as high as 20 mph.

    Low: 37 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 61.

    High: 61 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Veterans Day

    Veterans Day: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of showers between 10pm and 4am. Mostly cloudy, with a low around 43. Northwest wind 11 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.
Sunday
Sunny, with a high near 62. West wind 10 to 16 mph, with gusts as high as 29 mph.
Sunday Night
Mostly clear, with a low around 41. West wind 8 to 11 mph, with gusts as high as 21 mph.
Monday
Mostly sunny, with a high near 60. West wind 10 to 14 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around 37. West wind 6 to 8 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 61.
Tuesday Night
Mostly clear, with a low around 39.
Veterans Day
Sunny, with a high near 61.
Wednesday Night
Partly cloudy, with a low around 35.
Thursday
Partly sunny, with a high near 57.
Thursday Night
Rain and snow likely. Mostly cloudy, with a low around 33. Chance of precipitation is 60%.
Friday
Rain and snow likely. Partly sunny, with a high near 52. Chance of precipitation is 60%.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 29. Chance of precipitation is 40%.
Saturday
A 30 percent chance of rain. Partly sunny, with a high near 51.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Lyme CT
 41.32°N 72.29°W (Elev. 98 ft)
Last Update:
4:00 pm EST Nov 7, 2026
Forecast Valid:
7pm EST Nov 7, 2026-6pm EST Nov 14, 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