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

46°F

8°C

Humidity 42%
Wind Speed Vrbl 3 mph
Barometer 30.18 in (1021.9 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Last update 20 Nov 2:56 pm EST
Extended Forecast for

2 Miles SSE South Lyme CT

  • Tonight

    Tonight: Areas of frost after midnight. Otherwise, mostly clear, with a low around 35. Light and variable wind.

    Low: 35 °F

    Clear then
    Areas Frost

  • Friday

    Friday: Mostly cloudy, with a high near 53. Light south wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 53 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A 40 percent chance of rain. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 41. West wind around 6 mph becoming light and variable.

    Low: 41 °F

    Chance Rain
    and Patchy
    Fog

  • Saturday

    Saturday: A 40 percent chance of rain before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 50. North wind 7 to 10 mph.

    High: 50 °F

    Chance Rain

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 31. Northwest wind 6 to 8 mph.

    Low: 31 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 47.

    High: 47 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 37.

    Low: 37 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 51.

    High: 51 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 37.

    Low: 37 °F

    Partly Cloudy

Detailed Forecast

Tonight
Areas of frost after midnight. Otherwise, mostly clear, with a low around 35. Light and variable wind.
Friday
Mostly cloudy, with a high near 53. Light south wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Friday Night
A 40 percent chance of rain. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 41. West wind around 6 mph becoming light and variable.
Saturday
A 40 percent chance of rain before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 50. North wind 7 to 10 mph.
Saturday Night
Mostly clear, with a low around 31. Northwest wind 6 to 8 mph.
Sunday
Mostly sunny, with a high near 47.
Sunday Night
Partly cloudy, with a low around 37.
Monday
Sunny, with a high near 51.
Monday Night
Partly cloudy, with a low around 37.
Tuesday
A 30 percent chance of rain after 1pm. Cloudy, with a high near 54.
Tuesday Night
Rain. Low around 47. Chance of precipitation is 80%.
Wednesday
A 50 percent chance of rain. Mostly cloudy, with a high near 59.
Wednesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 43.
Thanksgiving Day
Mostly sunny, with a high near 52.
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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:
12:38 pm EST Nov 20, 2025
Forecast Valid:
3pm EST Nov 20, 2025-6pm EST Nov 27, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation