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

64°F

18°C

Humidity 54%
Wind Speed NW 14 G 22 mph
Barometer 29.75 in (1007.4 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 15 Jun 10:56 pm EDT
Extended Forecast for

3 Miles SSE South Lyme CT

  • Tonight

    Tonight: Clear, with a low around 57. Northwest wind 11 to 13 mph.

    Low: 57 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 72. Northwest wind 7 to 11 mph becoming southwest in the afternoon.

    High: 72 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 59. Southwest wind 5 to 9 mph becoming calm after midnight.

    Low: 59 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 72. Calm wind becoming south 5 to 8 mph in the morning.

    High: 72 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 60. Light south wind.

    Low: 60 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 40 percent chance of showers after 2pm. Mostly cloudy, with a high near 76. Breezy.

    High: 76 °F

    Mostly Cloudy
    then Chance
    Showers and
    Breezy

  • Thursday Night

    Thursday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 65.

    Low: 65 °F

    Chance
    Showers then
    Partly Cloudy

  • Juneteenth

    Juneteenth: A 30 percent chance of showers after 8am. Partly sunny, with a high near 77.

    High: 77 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 57. Northwest wind 11 to 13 mph.
Tuesday
Sunny, with a high near 72. Northwest wind 7 to 11 mph becoming southwest in the afternoon.
Tuesday Night
Mostly clear, with a low around 59. Southwest wind 5 to 9 mph becoming calm after midnight.
Wednesday
Mostly sunny, with a high near 72. Calm wind becoming south 5 to 8 mph in the morning.
Wednesday Night
Mostly cloudy, with a low around 60. Light south wind.
Thursday
A 40 percent chance of showers after 2pm. Mostly cloudy, with a high near 76. Breezy.
Thursday Night
A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 65.
Juneteenth
A 30 percent chance of showers after 8am. Partly sunny, with a high near 77.
Friday Night
Partly cloudy, with a low around 62.
Saturday
Sunny, with a high near 79.
Saturday Night
Mostly clear, with a low around 61.
Sunday
Sunny, with a high near 77.
Sunday Night
Partly cloudy, with a low around 61.
Monday
A 40 percent chance of showers. Partly sunny, with a high near 75.
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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:
7:54 pm EDT Jun 15, 2026
Forecast Valid:
11pm EDT Jun 15, 2026-6pm EDT Jun 22, 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