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

39°F

4°C

Humidity 41%
Wind Speed N 5 mph
Barometer 30.09 in (1018.9 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 15 Feb 12:56 pm EST
Extended Forecast for

3 Miles SE Old Lyme CT

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 38. East wind around 6 mph.

    High: 38 °F

    Partly Sunny

  • Tonight

    Tonight: A 50 percent chance of snow after 10pm. Cloudy, with a low around 27. Wind chill values between 20 and 25. East wind around 7 mph.

    Low: 27 °F

    Chance Snow

  • Washington's Birthday

    Washington's Birthday: Cloudy, then gradually becoming mostly sunny, with a high near 38. Wind chill values between 20 and 30. Northeast wind around 7 mph.

    High: 38 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 27. Calm wind.

    Low: 27 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 40. Calm wind becoming southwest 5 to 7 mph in the morning.

    High: 40 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Rain likely, mainly after noon. Cloudy, with a high near 41. Chance of precipitation is 70%.

    High: 41 °F

    Chance Rain
    then Rain
    Likely

  • Wednesday Night

    Wednesday Night: Rain likely, mainly before midnight. Mostly cloudy, with a low around 31. Chance of precipitation is 70%.

    Low: 31 °F

    Rain Likely
    then Chance
    Rain

  • Thursday

    Thursday: Mostly cloudy, with a high near 39.

    High: 39 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Partly sunny, with a high near 38. East wind around 6 mph.
Tonight
A 50 percent chance of snow after 10pm. Cloudy, with a low around 27. Wind chill values between 20 and 25. East wind around 7 mph.
Washington's Birthday
Cloudy, then gradually becoming mostly sunny, with a high near 38. Wind chill values between 20 and 30. Northeast wind around 7 mph.
Monday Night
Mostly cloudy, with a low around 27. Calm wind.
Tuesday
Mostly cloudy, with a high near 40. Calm wind becoming southwest 5 to 7 mph in the morning.
Tuesday Night
Partly cloudy, with a low around 30.
Wednesday
Rain likely, mainly after noon. Cloudy, with a high near 41. Chance of precipitation is 70%.
Wednesday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 31. Chance of precipitation is 70%.
Thursday
Mostly cloudy, with a high near 39.
Thursday Night
Partly cloudy, with a low around 30.
Friday
Rain likely. Mostly cloudy, with a high near 41. Chance of precipitation is 60%.
Friday Night
Rain likely. Mostly cloudy, with a low around 31. Chance of precipitation is 60%.
Saturday
A 40 percent chance of rain. Mostly cloudy, with a high near 41.
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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:
1:10 pm EST Feb 15, 2026
Forecast Valid:
1pm EST Feb 15, 2026-6pm EST Feb 21, 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