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.

A Few Clouds

69°F

21°C

Humidity 100%
Wind Speed Calm
Barometer 30.01 in (1016.3 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 18 Sep 6:56 am EDT
Extended Forecast for

3 Miles ESE South Lyme CT

  • Today

    Today: Mostly sunny, with a high near 78. Northwest wind 6 to 8 mph.

    High: 78 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 54. North wind 8 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 cloudy, with a low around 56. Light southeast wind.

    Low: 56 °F

    Mostly Cloudy

  • Sunday

    Sunday: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 67. Southeast wind 6 to 9 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 67 °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 64. Breezy.

    High: 64 °F

    Chance
    Showers and
    Breezy

Detailed Forecast

Today
Mostly sunny, with a high near 78. Northwest wind 6 to 8 mph.
Tonight
Partly cloudy, with a low around 54. North wind 8 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 cloudy, with a low around 56. Light southeast wind.
Sunday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 67. 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 64. Breezy.
Tuesday Night
Mostly cloudy, with a low around 53.
Wednesday
Partly sunny, with a high near 65. Breezy.
Wednesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 53.
Thursday
A 30 percent chance of showers. Partly sunny, with a high near 66. Breezy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ESE South Lyme CT
 41.3°N 72.24°W (Elev. 0 ft)
Last Update:
5:16 am EDT Sep 18, 2026
Forecast Valid:
7am EDT Sep 18, 2026-6pm EDT Sep 24, 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