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

39°F

4°C

Humidity 96%
Wind Speed Calm
Barometer 29.93 in (1013.6 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 23 Apr 4:56 am EDT
Extended Forecast for

2 Miles SSE South Lyme CT

  • Today

    Today: Patchy fog before 8am. Otherwise, sunny, with a high near 66. Light northwest wind increasing to 8 to 13 mph in the morning.

    High: 66 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 44. Northwest wind around 6 mph becoming calm after midnight.

    Low: 44 °F

    Mostly Cloudy

  • Friday

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

    High: 58 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly clear, with a low around 40. Light and variable wind.

    Low: 40 °F

    Mostly Clear

  • Saturday

    Saturday: A 50 percent chance of rain. Partly sunny, with a high near 51. Southeast wind 5 to 7 mph.

    High: 51 °F

    Chance Rain

  • Saturday Night

    Saturday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 40.

    Low: 40 °F

    Chance Rain

  • Sunday

    Sunday: Partly sunny, with a high near 55.

    High: 55 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 57.

    High: 57 °F

    Mostly Sunny

Detailed Forecast

Today
Patchy fog before 8am. Otherwise, sunny, with a high near 66. Light northwest wind increasing to 8 to 13 mph in the morning.
Tonight
Mostly cloudy, with a low around 44. Northwest wind around 6 mph becoming calm after midnight.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 58. North wind around 5 mph becoming southwest in the afternoon.
Friday Night
Mostly clear, with a low around 40. Light and variable wind.
Saturday
A 50 percent chance of rain. Partly sunny, with a high near 51. Southeast wind 5 to 7 mph.
Saturday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 40.
Sunday
Partly sunny, with a high near 55.
Sunday Night
Partly cloudy, with a low around 43.
Monday
Mostly sunny, with a high near 57.
Monday Night
Partly cloudy, with a low around 44.
Tuesday
A 50 percent chance of showers. Partly sunny, with a high near 56.
Tuesday Night
Showers likely. Mostly cloudy, with a low around 45. Chance of precipitation is 60%.
Wednesday
A 40 percent chance of showers. Mostly cloudy, with a high near 57.
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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:
5:06 am EDT Apr 23, 2026
Forecast Valid:
5am EDT Apr 23, 2026-6pm EDT Apr 29, 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