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.

Mostly Cloudy

75°F

24°C

Humidity 79%
Wind Speed N 8 mph
Barometer 30.05 in (1017.4 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 18 Sep 9:56 am EDT
Extended Forecast for

3 Miles SSE South Lyme CT

  • Today

    Today: Sunny, with a high near 78. Northwest wind around 8 mph.

    High: 78 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 54. Northeast wind 7 to 11 mph.

    Low: 54 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 67. Northeast wind 5 to 9 mph becoming light and variable in the afternoon.

    High: 67 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear during the early evening, then becoming mostly cloudy, with a low around 57. Southeast wind 3 to 5 mph.

    Low: 57 °F

    Mostly Cloudy

  • Sunday

    Sunday: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 68. Southeast wind 6 to 9 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 68 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers. Low around 59. Chance of precipitation is 80%. New precipitation amounts between 1 and 2 inches possible.

    Low: 59 °F

    Showers

  • Monday

    Monday: Showers likely, mainly before 8am. Mostly cloudy, with a high near 67. Chance of precipitation is 60%.

    High: 67 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 55.

    Low: 55 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A 40 percent chance of showers. Mostly cloudy, with a high near 63. Breezy.

    High: 63 °F

    Chance
    Showers and
    Breezy

Detailed Forecast

Today
Sunny, with a high near 78. Northwest wind around 8 mph.
Tonight
Partly cloudy, with a low around 54. Northeast wind 7 to 11 mph.
Saturday
Mostly sunny, with a high near 67. Northeast wind 5 to 9 mph becoming light and variable in the afternoon.
Saturday Night
Mostly clear during the early evening, then becoming mostly cloudy, with a low around 57. Southeast wind 3 to 5 mph.
Sunday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 68. Southeast wind 6 to 9 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Showers. Low around 59. Chance of precipitation is 80%. New precipitation amounts between 1 and 2 inches possible.
Monday
Showers likely, mainly before 8am. Mostly cloudy, with a high near 67. Chance of precipitation is 60%.
Monday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 55.
Tuesday
A 40 percent chance of showers. Mostly cloudy, with a high near 63. Breezy.
Tuesday Night
Mostly cloudy, with a low around 54.
Wednesday
A 30 percent chance of showers. Partly sunny, with a high near 65. Breezy.
Wednesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 54. Breezy.
Thursday
A 30 percent chance of showers. Partly sunny, with a high near 65. Breezy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE South Lyme CT
 41.28°N 72.27°W (Elev. 0 ft)
Last Update:
5:16 am EDT Sep 18, 2026
Forecast Valid:
10am EDT Sep 18, 2026-6pm EDT Sep 24, 2026
 
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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