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.

Overcast

35°F

2°C

Humidity 82%
Wind Speed W 10 G 22 mph
Barometer 30.10 in (1019.1 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 17 Jan 7:56 pm EST
Extended Forecast for

3 Miles SE Old Lyme CT

Winter Weather Advisory January 18, 10:00am until January 18, 10:00pm
Click here for hazard details and duration
Winter Weather Advisory

  • Tonight

    Tonight: A 30 percent chance of snow after 4am. Mostly cloudy, with a low around 31. West wind around 6 mph becoming calm after midnight.

    Low: 31 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: Periods of snow, mainly after 7am. High near 35. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    High: 35 °F

    Snow

  • Sunday Night

    Sunday Night: A 50 percent chance of snow before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 25. Northeast wind around 6 mph becoming northwest after midnight.

    Low: 25 °F

    Chance Snow

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 34. Wind chill values between 20 and 25. West wind 6 to 15 mph.

    High: 34 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 19. West wind 11 to 14 mph, with gusts as high as 24 mph.

    Low: 19 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 25.

    High: 25 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 15.

    Low: 15 °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

Tonight
A 30 percent chance of snow after 4am. Mostly cloudy, with a low around 31. West wind around 6 mph becoming calm after midnight.
Sunday
Periods of snow, mainly after 7am. High near 35. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Sunday Night
A 50 percent chance of snow before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 25. Northeast wind around 6 mph becoming northwest after midnight.
M.L.King Day
Mostly sunny, with a high near 34. Wind chill values between 20 and 25. West wind 6 to 15 mph.
Monday Night
Partly cloudy, with a low around 19. West wind 11 to 14 mph, with gusts as high as 24 mph.
Tuesday
Mostly sunny, with a high near 25.
Tuesday Night
Mostly clear, with a low around 15.
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 32.
Friday Night
Mostly cloudy, with a low around 23.
Saturday
Partly sunny, with a high near 33.
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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:
5:41 pm EST Jan 17, 2026
Forecast Valid:
8pm EST Jan 17, 2026-6pm EST Jan 24, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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