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.

Light Rain

33°F

1°C

Humidity 92%
Wind Speed N 6 mph
Barometer 30.34 in (1027.3 mb)
Dewpoint 31°F (-1°C)
Visibility 7.00 mi
Wind Chill27°F (-3°C)
Last update 3 Mar 5:56 pm EST
Extended Forecast for

3 Miles SE Old Lyme CT

  • Tonight

    Tonight: Rain, mainly before 4am. Patchy fog between 7pm and 4am. Low around 34. East wind around 6 mph becoming west after midnight. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 34 °F

    Rain and
    Patchy Fog

  • Wednesday

    Wednesday: Mostly sunny, with a high near 48. Light southwest wind.

    High: 48 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of freezing rain after 4am. Increasing clouds, with a low around 30. Calm wind. Chance of precipitation is 20%.

    Low: 30 °F

    Partly Cloudy
    then Slight
    Chance
    Freezing Rain

  • Thursday

    Thursday: A chance of rain or freezing rain before 7am, then rain likely. Cloudy, with a high near 43. Calm wind becoming east around 6 mph in the afternoon. Chance of precipitation is 60%. Little or no ice accumulation expected.

    High: 43 °F

    Rain/Freezing
    Rain Likely
    then Rain
    Likely

  • Thursday Night

    Thursday Night: Rain. Low around 36. East wind around 7 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 36 °F

    Rain

  • Friday

    Friday: A 40 percent chance of rain before 1pm. Mostly cloudy, with a high near 45.

    High: 45 °F

    Chance Rain

  • Friday Night

    Friday Night: Cloudy, with a low around 35.

    Low: 35 °F

    Cloudy

  • Saturday

    Saturday: Cloudy, with a high near 50.

    High: 50 °F

    Cloudy

  • Saturday Night

    Saturday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 44. Chance of precipitation is 60%.

    Low: 44 °F

    Showers
    Likely

Detailed Forecast

Tonight
Rain, mainly before 4am. Patchy fog between 7pm and 4am. Low around 34. East wind around 6 mph becoming west after midnight. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
Mostly sunny, with a high near 48. Light southwest wind.
Wednesday Night
A slight chance of freezing rain after 4am. Increasing clouds, with a low around 30. Calm wind. Chance of precipitation is 20%.
Thursday
A chance of rain or freezing rain before 7am, then rain likely. Cloudy, with a high near 43. Calm wind becoming east around 6 mph in the afternoon. Chance of precipitation is 60%. Little or no ice accumulation expected.
Thursday Night
Rain. Low around 36. East wind around 7 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Friday
A 40 percent chance of rain before 1pm. Mostly cloudy, with a high near 45.
Friday Night
Cloudy, with a low around 35.
Saturday
Cloudy, with a high near 50.
Saturday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 44. Chance of precipitation is 60%.
Sunday
Partly sunny, with a high near 55.
Sunday Night
Partly cloudy, with a low around 41.
Monday
Mostly sunny, with a high near 55.
Monday Night
Partly cloudy, with a low around 40.
Tuesday
Mostly sunny, with a high near 54.
Basemap Options
Click map to change the forecast location
Loading map...
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:
5:47 pm EST Mar 3, 2026
Forecast Valid:
6pm EST Mar 3, 2026-6pm EDT Mar 10, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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