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

44°F

7°C

Humidity 93%
Wind Speed Calm
Barometer 29.73 in (1006.6 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 21 Mar 3:56 am EDT
Extended Forecast for

2 Miles SSE South Lyme CT

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 52. Northwest wind 6 to 9 mph.

    High: 52 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Mostly cloudy, with a low around 38. Light and variable wind.

    Low: 38 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 30 percent chance of rain after 2pm. Mostly cloudy, with a high near 51. Southwest wind 7 to 10 mph.

    High: 51 °F

    Mostly Cloudy
    then Chance
    Rain

  • Sunday Night

    Sunday Night: Rain, mainly after 8pm. Low around 37. Southwest wind 5 to 7 mph becoming north after midnight. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 37 °F

    Rain

  • Monday

    Monday: A 40 percent chance of rain before 2pm. Mostly cloudy, with a high near 44. North wind around 10 mph, with gusts as high as 20 mph.

    High: 44 °F

    Chance Rain

  • Monday Night

    Monday Night: Partly cloudy, with a low around 29.

    Low: 29 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 44.

    High: 44 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 33.

    Low: 33 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 48.

    High: 48 °F

    Partly Sunny

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 52. Northwest wind 6 to 9 mph.
Tonight
Mostly cloudy, with a low around 38. Light and variable wind.
Sunday
A 30 percent chance of rain after 2pm. Mostly cloudy, with a high near 51. Southwest wind 7 to 10 mph.
Sunday Night
Rain, mainly after 8pm. Low around 37. Southwest wind 5 to 7 mph becoming north after midnight. Chance of precipitation is 80%. 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 44. North wind around 10 mph, with gusts as high as 20 mph.
Monday Night
Partly cloudy, with a low around 29.
Tuesday
Sunny, with a high near 44.
Tuesday Night
Mostly cloudy, with a low around 33.
Wednesday
Partly sunny, with a high near 48.
Wednesday Night
Mostly cloudy, with a low around 34.
Thursday
Mostly cloudy, with a high near 47.
Thursday Night
Rain likely. Mostly cloudy, with a low around 37. Chance of precipitation is 60%.
Friday
Rain likely. Partly sunny, with a high near 48. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE South Lyme CT
 41.28°N 72.3°W (Elev. 0 ft)
Last Update:
2:34 am EDT Mar 21, 2026
Forecast Valid:
4am EDT Mar 21, 2026-6pm EDT Mar 27, 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