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.

Overcast

39°F

4°C

Humidity 86%
Wind Speed SE 10 mph
Barometer 29.98 in (1015.0 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 22 Mar 5:56 am EDT
Extended Forecast for

3 Miles SE South Lyme CT

  • Today

    Today: Rain likely, mainly after 5pm. Mostly cloudy, with a high near 48. Southeast wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 48 °F

    Rain Likely

  • Tonight

    Tonight: Rain, mainly before 11pm, then showers after 11pm. Low around 38. Light and variable wind becoming north around 6 mph after midnight. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 38 °F

    Rain

  • Monday

    Monday: A 40 percent chance of rain before 2pm. Mostly cloudy, with a high near 43. North wind around 14 mph.

    High: 43 °F

    Chance Rain

  • Monday Night

    Monday Night: Partly cloudy, with a low around 31. Wind chill values between 25 and 30. Northwest wind around 11 mph.

    Low: 31 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 43. Northwest wind 6 to 8 mph becoming southwest in the afternoon.

    High: 43 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 35.

    Low: 35 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Partly sunny, with a high near 47.

    High: 47 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 30 percent chance of rain. Mostly cloudy, with a high near 49.

    High: 49 °F

    Chance Rain

Detailed Forecast

Today
Rain likely, mainly after 5pm. Mostly cloudy, with a high near 48. Southeast wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Rain, mainly before 11pm, then showers after 11pm. Low around 38. Light and variable wind becoming north around 6 mph after midnight. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Monday
A 40 percent chance of rain before 2pm. Mostly cloudy, with a high near 43. North wind around 14 mph.
Monday Night
Partly cloudy, with a low around 31. Wind chill values between 25 and 30. Northwest wind around 11 mph.
Tuesday
Sunny, with a high near 43. Northwest wind 6 to 8 mph becoming southwest in the afternoon.
Tuesday Night
Increasing clouds, with a low around 35.
Wednesday
Partly sunny, with a high near 47.
Wednesday Night
Mostly cloudy, with a low around 38.
Thursday
A 30 percent chance of rain. Mostly cloudy, with a high near 49.
Thursday Night
Rain likely. Mostly cloudy, with a low around 41. Chance of precipitation is 60%.
Friday
Partly sunny, with a high near 47.
Friday Night
Partly cloudy, with a low around 27.
Saturday
Sunny, with a high near 39.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE South Lyme CT
 41.3°N 72.24°W (Elev. 0 ft)
Last Update:
2:51 am EDT Mar 22, 2026
Forecast Valid:
6am EDT Mar 22, 2026-6pm EDT Mar 28, 2026
 
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Additional Resources

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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