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

71°F

22°C

Humidity 61%
Wind Speed SE 12 mph
Barometer 30.14 in (1020.5 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 2 Sep 2:56 pm EDT
Extended Forecast for

3 Miles E South Lyme CT

  • This Afternoon

    This Afternoon: A 20 percent chance of showers before 5pm. Partly sunny, with a high near 73. Southeast wind around 8 mph.

    High: 73 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: Showers and possibly a thunderstorm, mainly after 2am. Low around 64. Southeast wind 3 to 5 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 64 °F

    Slight Chance
    Showers then
    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm before 11am, then a chance of showers and thunderstorms, mainly after 2pm. High near 82. Southwest wind 7 to 9 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 82 °F

    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 66. Calm wind.

    Low: 66 °F

    Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 84. West wind 3 to 7 mph.

    High: 84 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Saturday

    Saturday: A 30 percent chance of showers after 2pm. Increasing clouds, with a high near 77.

    High: 77 °F

    Sunny then
    Chance
    Showers

  • Saturday Night

    Saturday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 56.

    Low: 56 °F

    Chance
    Showers then
    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers before 5pm. Partly sunny, with a high near 73. Southeast wind around 8 mph.
Tonight
Showers and possibly a thunderstorm, mainly after 2am. Low around 64. Southeast wind 3 to 5 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers and possibly a thunderstorm before 11am, then a chance of showers and thunderstorms, mainly after 2pm. High near 82. Southwest wind 7 to 9 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 66. Calm wind.
Friday
Sunny, with a high near 84. West wind 3 to 7 mph.
Friday Night
Mostly clear, with a low around 61.
Saturday
A 30 percent chance of showers after 2pm. Increasing clouds, with a high near 77.
Saturday Night
A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 56.
Sunday
Sunny, with a high near 74.
Sunday Night
Mostly clear, with a low around 56.
Labor Day
Sunny, with a high near 76.
Monday Night
Partly cloudy, with a low around 59.
Tuesday
Mostly sunny, with a high near 77.
Tuesday Night
Partly cloudy, with a low around 59.
Wednesday
Mostly sunny, with a high near 76.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles E South Lyme CT
 41.32°N 72.26°W (Elev. 98 ft)
Last Update:
3:08 pm EDT Sep 2, 2026
Forecast Valid:
3pm EDT Sep 2, 2026-6pm EDT Sep 9, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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