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.

A Few Clouds and Breezy

33°F

1°C

Humidity 48%
Wind Speed NW 22 G 31 mph
Barometer 29.91 in (1012.7 mb)
Dewpoint 15°F (-9°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 12 Jan 1:56 am EST
Extended Forecast for

3 Miles SE Old Lyme CT

  • Overnight

    Overnight: Mostly clear, with a low around 28. Wind chill values between 20 and 25. Breezy, with a west wind 18 to 20 mph, with gusts as high as 37 mph.

    Low: 28 °F

    Mostly Clear
    and Breezy

  • Monday

    Monday: Mostly sunny, with a high near 39. Wind chill values between 15 and 25. West wind 16 to 18 mph, with gusts as high as 30 mph.

    High: 39 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 32. West wind around 9 mph.

    Low: 32 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 43. West wind 7 to 10 mph.

    High: 43 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a steady temperature around 39. South wind 8 to 10 mph, with gusts as high as 21 mph.

    Low: 39 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of showers before 1pm. Mostly cloudy, with a high near 45.

    High: 45 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers. Cloudy, with a low around 35.

    Low: 35 °F

    Chance
    Showers

  • 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 50 percent chance of snow. Mostly cloudy, with a low around 24.

    Low: 24 °F

    Chance Snow

Detailed Forecast

Overnight
Mostly clear, with a low around 28. Wind chill values between 20 and 25. Breezy, with a west wind 18 to 20 mph, with gusts as high as 37 mph.
Monday
Mostly sunny, with a high near 39. Wind chill values between 15 and 25. West wind 16 to 18 mph, with gusts as high as 30 mph.
Monday Night
Mostly clear, with a low around 32. West wind around 9 mph.
Tuesday
Sunny, with a high near 43. West wind 7 to 10 mph.
Tuesday Night
Mostly cloudy, with a steady temperature around 39. South wind 8 to 10 mph, with gusts as high as 21 mph.
Wednesday
A 30 percent chance of showers before 1pm. Mostly cloudy, with a high near 45.
Wednesday Night
A 30 percent chance of showers. Cloudy, with a low around 35.
Thursday
A 40 percent chance of rain. Mostly cloudy, with a high near 43.
Thursday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 24.
Friday
A 30 percent chance of snow before 1pm. Partly sunny, with a high near 34.
Friday Night
Partly cloudy, with a low around 25.
Saturday
Mostly sunny, with a high near 40.
Saturday Night
Mostly cloudy, with a low around 28.
Sunday
A 30 percent chance of snow showers. Partly sunny, with a high near 38.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE Old Lyme CT
 41.28°N 72.3°W (Elev. 0 ft)
Last Update:
1:57 am EST Jan 12, 2026
Forecast Valid:
2am EST Jan 12, 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