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

62°F

17°C

Humidity 90%
Wind Speed N 6 mph
Barometer 30.14 in (1020.5 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 15 Aug 6:56 am EDT
Extended Forecast for

3 Miles SSE South Lyme CT

  • Today

    Today: Sunny, with a high near 78. Northeast wind around 5 mph becoming light and variable in the morning.

    High: 78 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 63. Calm wind.

    Low: 63 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 78. Calm wind becoming south 5 to 8 mph in the afternoon.

    High: 78 °F

    Sunny

  • Sunday Night

    Sunday Night: Showers, mainly after 8pm. Low around 68. South wind 10 to 15 mph. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 68 °F

    Showers

  • Monday

    Monday: Showers, mainly before 8am. High near 79. Southeast wind 8 to 14 mph becoming northeast in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 79 °F

    Showers then
    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 66.

    Low: 66 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 78. Northeast wind around 5 mph becoming light and variable in the morning.
Tonight
Mostly clear, with a low around 63. Calm wind.
Sunday
Sunny, with a high near 78. Calm wind becoming south 5 to 8 mph in the afternoon.
Sunday Night
Showers, mainly after 8pm. Low around 68. South wind 10 to 15 mph. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.
Monday
Showers, mainly before 8am. High near 79. Southeast wind 8 to 14 mph becoming northeast in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Monday Night
Partly cloudy, with a low around 66.
Tuesday
Sunny, with a high near 80.
Tuesday Night
Mostly clear, with a low around 66.
Wednesday
Sunny, with a high near 80.
Wednesday Night
A 30 percent chance of showers after 2am. Partly cloudy, with a low around 69.
Thursday
A 40 percent chance of showers. Partly sunny, with a high near 80.
Thursday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 64.
Friday
Mostly sunny, with a high near 77.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE South Lyme CT
 41.28°N 72.27°W (Elev. 0 ft)
Last Update:
2:20 am EDT Aug 15, 2026
Forecast Valid:
7am EDT Aug 15, 2026-6pm EDT Aug 21, 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