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

51°F

11°C

Humidity 74%
Wind Speed NW 10 G 22 mph
Barometer 29.73 in (1006.7 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Wind Chill47°F (8°C)
Last update 7 Nov 7:56 pm EST
Extended Forecast for

Old Lyme CT

  • Tonight

    Tonight: A chance of showers between 10pm and 4am. Mostly cloudy, with a low around 42. Northwest wind 10 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.

    Low: 42 °F

    Chance
    Showers

  • Sunday

    Sunday: Sunny, with a high near 62. West wind 10 to 16 mph, with gusts as high as 28 mph.

    High: 62 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 41. West wind 7 to 10 mph, with gusts as high as 21 mph.

    Low: 41 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 59. West wind 10 to 13 mph, with gusts as high as 24 mph.

    High: 59 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 36. West wind 5 to 7 mph, with gusts as high as 20 mph.

    Low: 36 °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 42. Northwest wind 10 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 28 mph.
Sunday Night
Mostly clear, with a low around 41. West wind 7 to 10 mph, with gusts as high as 21 mph.
Monday
Mostly sunny, with a high near 59. West wind 10 to 13 mph, with gusts as high as 24 mph.
Monday Night
Mostly clear, with a low around 36. West wind 5 to 7 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 likely. Mostly cloudy, with a low around 33. Chance of precipitation is 60%.
Friday
A 50 percent chance of rain. Partly sunny, with a high near 51.
Friday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 30.
Saturday
A 30 percent chance of rain. Partly sunny, with a high near 51.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Old Lyme CT
 41.31°N 72.36°W (Elev. 30 ft)
Last Update:
4:00 pm EST Nov 7, 2026
Forecast Valid:
8pm EST Nov 7, 2026-6pm EST Nov 14, 2026
 
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Additional Resources

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Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation