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.

Fog/Mist

46°F

8°C

Humidity 96%
Wind Speed SE 6 mph
Barometer 29.93 in (1013.4 mb)
Dewpoint 45°F (7°C)
Visibility 2.00 mi
Wind Chill43°F (6°C)
Last update 19 Apr 1:56 am EDT
Extended Forecast for

2 Miles SSE South Lyme CT

  • Overnight

    Overnight: Areas of fog. Otherwise, cloudy, with a low around 46. Calm wind.

    Low: 46 °F

    Areas Fog

  • Sunday

    Sunday: Showers, mainly before 5pm. Patchy fog before 11am. High near 56. Southeast wind 6 to 15 mph becoming northwest in the morning. Winds could gust as high as 29 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 56 °F

    Showers and
    Patchy Fog

  • Sunday Night

    Sunday Night: A 30 percent chance of showers before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 38. West wind 5 to 8 mph, with gusts as high as 20 mph.

    Low: 38 °F

    Chance
    Showers then
    Mostly Clear

  • Monday

    Monday: A 20 percent chance of showers after 2pm. Mostly sunny, with a high near 50. Northwest wind 7 to 9 mph.

    High: 50 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: Mostly clear, with a low around 33. North wind around 7 mph.

    Low: 33 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 49.

    High: 49 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 39.

    Low: 39 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 56.

    High: 56 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

Detailed Forecast

Overnight
Areas of fog. Otherwise, cloudy, with a low around 46. Calm wind.
Sunday
Showers, mainly before 5pm. Patchy fog before 11am. High near 56. Southeast wind 6 to 15 mph becoming northwest in the morning. Winds could gust as high as 29 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
A 30 percent chance of showers before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 38. West wind 5 to 8 mph, with gusts as high as 20 mph.
Monday
A 20 percent chance of showers after 2pm. Mostly sunny, with a high near 50. Northwest wind 7 to 9 mph.
Monday Night
Mostly clear, with a low around 33. North wind around 7 mph.
Tuesday
Sunny, with a high near 49.
Tuesday Night
Increasing clouds, with a low around 39.
Wednesday
Mostly cloudy, with a high near 56.
Wednesday Night
Mostly clear, with a low around 40.
Thursday
Mostly sunny, with a high near 61.
Thursday Night
Partly cloudy, with a low around 45.
Friday
Mostly sunny, with a high near 60.
Friday Night
Partly cloudy, with a low around 44.
Saturday
A 30 percent chance of showers. Mostly sunny, with a high near 58.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE South Lyme CT
 41.28°N 72.3°W (Elev. 0 ft)
Last Update:
6:34 pm EDT Apr 18, 2026
Forecast Valid:
2am EDT Apr 19, 2026-6pm EDT Apr 25, 2026
 
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