Current conditions at

Groton / New London, Groton / New London Airport (KGON)

Lat: 41.33°NLon: 72.05°WElev: 10ft.

Overcast

46°F

8°C

Humidity 83%
Wind Speed Vrbl 5 mph
Barometer 30.03 in (1016.9 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 22 Apr 7:56 pm EDT
Extended Forecast for

South Lyme CT

  • Tonight

    Tonight: Patchy fog after 4am.  Otherwise, cloudy, with a low around 41. Calm wind.

    Low: 41 °F

    Cloudy then
    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 8am.  Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 66. Light west wind becoming northwest 6 to 11 mph in the morning. Winds could gust as high as 22 mph.

    High: 66 °F

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 44. Light north wind.

    Low: 44 °F

    Increasing
    Clouds

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 58. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 58 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly clear, with a low around 39. Calm wind.

    Low: 39 °F

    Mostly Clear

  • Saturday

    Saturday: A 30 percent chance of showers after 2pm.  Partly sunny, with a high near 53.

    High: 53 °F

    Mostly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A 30 percent chance of showers.  Mostly cloudy, with a low around 40.

    Low: 40 °F

    Chance
    Showers

  • Sunday

    Sunday: A 30 percent chance of showers before 2pm.  Mostly cloudy, with a high near 56.

    High: 56 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy

Detailed Forecast

Tonight
Patchy fog after 4am. Otherwise, cloudy, with a low around 41. Calm wind.
Thursday
Patchy fog before 8am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 66. Light west wind becoming northwest 6 to 11 mph in the morning. Winds could gust as high as 22 mph.
Thursday Night
Increasing clouds, with a low around 44. Light north wind.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 58. Calm wind becoming northwest around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 39. Calm wind.
Saturday
A 30 percent chance of showers after 2pm. Partly sunny, with a high near 53.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 40.
Sunday
A 30 percent chance of showers before 2pm. Mostly cloudy, with a high near 56.
Sunday Night
Partly cloudy, with a low around 41.
Monday
Mostly sunny, with a high near 59.
Monday Night
Partly cloudy, with a low around 43.
Tuesday
A 50 percent chance of showers. Partly sunny, with a high near 59.
Tuesday Night
Showers likely. Mostly cloudy, with a low around 46. Chance of precipitation is 60%.
Wednesday
A 40 percent chance of showers. Mostly cloudy, with a high near 59.
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ABOUT THIS FORECAST

 
Point Forecast:
South Lyme CT
 41.32°N 72.29°W (Elev. 98 ft)
8:00 pm EDT Apr 22, 2026
8pm EDT Apr 22, 2026-6pm EDT Apr 29, 2026
 
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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