National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Groton / New London, Groton / New London Airport (KGON)

Lat: 41.33°NLon: 72.05°WElev: 10ft.

Unknown Precip Fog/Mist

33°F

1°C

Humidity 96%
Wind Speed NE 3 mph
Barometer 30.06 in (1017.7 mb)
Dewpoint 32°F (0°C)
Visibility 2.00 mi
Last update 18 Jan 10:56 am EST
Extended Forecast for

3 Miles SE Old Lyme CT

Winter Weather Advisory until January 19, 04:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory until January 19, 04:00am

    NOW until 4:00am Mon

    Winter Weather Advisory

  • This Afternoon

    High: 35 °F

    Rain/Snow

  • Tonight

    Tonight: Snow, mainly before 1am. Low around 24. North wind 5 to 7 mph becoming northwest after midnight. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.

    Low: 24 °F

    Snow

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 32. Wind chill values between 15 and 20. West wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 29 mph.

    High: 32 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 18. Wind chill values between 10 and 15. West wind 13 to 15 mph, with gusts as high as 28 mph.

    Low: 18 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 25. West wind 11 to 17 mph, with gusts as high as 28 mph.

    High: 25 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 13.

    Low: 13 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 37.

    High: 37 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 30.

    Low: 30 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Snow, possibly mixed with rain, becoming all snow after 4pm. High near 35. Northeast wind 3 to 6 mph. Chance of precipitation is 100%. Total daytime snow accumulation of less than a half inch possible.
Tonight
Snow, mainly before 1am. Low around 24. North wind 5 to 7 mph becoming northwest after midnight. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.
M.L.King Day
Mostly sunny, with a high near 32. Wind chill values between 15 and 20. West wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 29 mph.
Monday Night
Partly cloudy, with a low around 18. Wind chill values between 10 and 15. West wind 13 to 15 mph, with gusts as high as 28 mph.
Tuesday
Mostly sunny, with a high near 25. West wind 11 to 17 mph, with gusts as high as 28 mph.
Tuesday Night
Mostly clear, with a low around 13.
Wednesday
Mostly sunny, with a high near 37.
Wednesday Night
Mostly cloudy, with a low around 30.
Thursday
Partly sunny, with a high near 38.
Thursday Night
Partly cloudy, with a low around 20.
Friday
Mostly sunny, with a high near 33.
Friday Night
Mostly cloudy, with a low around 25.
Saturday
A chance of rain and snow. Mostly cloudy, with a high near 36. Chance of precipitation is 30%.
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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:
10:00 am EST Jan 18, 2026
Forecast Valid:
12pm EST Jan 18, 2026-6pm EST Jan 24, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation