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

68°F

20°C

Humidity 81%
Wind Speed NW 8 mph
Barometer 29.97 in (1014.9 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 20 May 11:56 pm EDT
Extended Forecast for

Groton CT

  • Overnight

    Overnight: A 40 percent chance of showers, mainly before 2am. Mostly cloudy, with a low around 53. Northwest wind around 6 mph.

    Low: 53 °F

    Chance
    Showers

  • Thursday

    Thursday: A 50 percent chance of showers before 2pm. Mostly cloudy, with a steady temperature around 56. Northeast wind 5 to 8 mph becoming southeast in the afternoon.

    High: 56 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy during the early evening, then gradual clearing, with a low around 49. Calm wind.

    Low: 49 °F

    Gradual
    Clearing

  • Friday

    Friday: Sunny, with a high near 61. Northeast wind around 9 mph becoming southeast in the afternoon.

    High: 61 °F

    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 49. Light and variable wind.

    Low: 49 °F

    Mostly Cloudy

  • Saturday

    Saturday: Showers likely, mainly after 2pm. Cloudy, with a high near 58. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 58 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers. Low around 49. Chance of precipitation is 80%.

    Low: 49 °F

    Showers

  • Sunday

    Sunday: Showers. High near 62. Chance of precipitation is 80%.

    High: 62 °F

    Showers

  • Sunday Night

    Sunday Night: A 50 percent chance of showers. Cloudy, with a low around 52.

    Low: 52 °F

    Chance
    Showers

Detailed Forecast

Overnight
A 40 percent chance of showers, mainly before 2am. Mostly cloudy, with a low around 53. Northwest wind around 6 mph.
Thursday
A 50 percent chance of showers before 2pm. Mostly cloudy, with a steady temperature around 56. Northeast wind 5 to 8 mph becoming southeast in the afternoon.
Thursday Night
Mostly cloudy during the early evening, then gradual clearing, with a low around 49. Calm wind.
Friday
Sunny, with a high near 61. Northeast wind around 9 mph becoming southeast in the afternoon.
Friday Night
Mostly cloudy, with a low around 49. Light and variable wind.
Saturday
Showers likely, mainly after 2pm. Cloudy, with a high near 58. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Showers. Low around 49. Chance of precipitation is 80%.
Sunday
Showers. High near 62. Chance of precipitation is 80%.
Sunday Night
A 50 percent chance of showers. Cloudy, with a low around 52.
Memorial Day
A 40 percent chance of showers before 2pm. Mostly cloudy, with a high near 67.
Monday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 54.
Tuesday
Partly sunny, with a high near 71.
Tuesday Night
Mostly cloudy, with a low around 56.
Wednesday
Mostly sunny, with a high near 73.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Groton CT
 41.32°N 72.06°W (Elev. 3 ft)
Last Update:
9:00 pm EDT May 20, 2026
Forecast Valid:
12am EDT May 21, 2026-6pm EDT May 27, 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