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.

Mostly Cloudy

39°F

4°C

Humidity 26%
Wind Speed W 14 mph
Barometer 30.39 in (1028.9 mb)
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Wind Chill31°F (-1°C)
Last update 28 Mar 5:56 pm EDT
Extended Forecast for

3 Miles SSE South Lyme CT

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 29. Northwest wind around 6 mph becoming calm after midnight. Winds could gust as high as 23 mph.

    Low: 29 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 47. Light west wind becoming southwest 6 to 11 mph in the morning. Winds could gust as high as 22 mph.

    High: 47 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 39. Southwest wind 8 to 10 mph, with gusts as high as 22 mph.

    Low: 39 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 57. Southwest wind 8 to 13 mph, with gusts as high as 23 mph.

    High: 57 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A 30 percent chance of showers, mainly after 2am. Mostly cloudy, with a low around 45. Southwest wind 5 to 7 mph.

    Low: 45 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A 30 percent chance of rain before 2pm. Partly sunny, with a high near 62.

    High: 62 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of rain after 2pm. Partly sunny, with a high near 62.

    High: 62 °F

    Partly Sunny
    then Chance
    Rain

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after 8pm. Mostly cloudy, with a low around 38. Chance of precipitation is 70%.

    Low: 38 °F

    Rain Likely

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming clear, with a low around 29. Northwest wind around 6 mph becoming calm after midnight. Winds could gust as high as 23 mph.
Sunday
Sunny, with a high near 47. Light west wind becoming southwest 6 to 11 mph in the morning. Winds could gust as high as 22 mph.
Sunday Night
Mostly cloudy, with a low around 39. Southwest wind 8 to 10 mph, with gusts as high as 22 mph.
Monday
Mostly cloudy, with a high near 57. Southwest wind 8 to 13 mph, with gusts as high as 23 mph.
Monday Night
A 30 percent chance of showers, mainly after 2am. Mostly cloudy, with a low around 45. Southwest wind 5 to 7 mph.
Tuesday
A 30 percent chance of rain before 2pm. Partly sunny, with a high near 62.
Tuesday Night
Partly cloudy, with a low around 50.
Wednesday
A 40 percent chance of rain after 2pm. Partly sunny, with a high near 62.
Wednesday Night
Rain likely, mainly after 8pm. Mostly cloudy, with a low around 38. Chance of precipitation is 70%.
Thursday
A 50 percent chance of rain. Mostly cloudy, with a high near 46.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 34. Chance of precipitation is 50%.
Friday
Rain and snow likely. Mostly cloudy, with a high near 44. Chance of precipitation is 60%.
Friday Night
Rain likely. Cloudy, with a low around 36. Chance of precipitation is 60%.
Saturday
A 30 percent chance of rain. Mostly cloudy, with a high near 49.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE South Lyme CT
 41.3°N 72.27°W (Elev. 75 ft)
Last Update:
2:35 pm EDT Mar 28, 2026
Forecast Valid:
6pm EDT Mar 28, 2026-6pm EDT Apr 4, 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