National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

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 93%
Wind Speed Calm
Barometer 29.78 in (1008.5 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 20 Jun 9:56 pm EDT
Extended Forecast for

3 Miles SSE South Lyme CT

  • Tonight

    Tonight: Mostly clear, with a low around 61. Calm wind.

    Low: 61 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 77. Calm wind becoming west 5 to 8 mph in the afternoon.

    High: 77 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 61. Light and variable wind.

    Low: 61 °F

    Partly Cloudy

  • Monday

    Monday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 72. Calm wind becoming southeast 5 to 7 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 72 °F

    Chance
    Showers then
    Showers
    Likely

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm. Low around 63. South wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    Low: 63 °F

    Showers

  • Tuesday

    Tuesday: Showers likely, mainly before 2pm. Mostly cloudy, with a high near 76. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    High: 76 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 62.

    Low: 62 °F

    Chance
    Showers then
    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 61. Calm wind.
Sunday
Sunny, with a high near 77. Calm wind becoming west 5 to 8 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 61. Light and variable wind.
Monday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 72. Calm wind becoming southeast 5 to 7 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Monday Night
Showers and possibly a thunderstorm. Low around 63. South wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Tuesday
Showers likely, mainly before 2pm. Mostly cloudy, with a high near 76. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 62.
Wednesday
Sunny, with a high near 76.
Wednesday Night
Mostly clear, with a low around 63.
Thursday
Sunny, with a high near 75.
Thursday Night
A 30 percent chance of showers. Partly cloudy, with a low around 64.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 75.
Friday Night
Partly cloudy, with a low around 64.
Saturday
Mostly sunny, with a high near 78.
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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:
9:59 pm EDT Jun 20, 2026
Forecast Valid:
10pm EDT Jun 20, 2026-6pm EDT Jun 27, 2026
 
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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