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

67°F

19°C

Humidity 93%
Wind Speed S 13 mph
Barometer 30.23 in (1023.7 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 6 Oct 4:56 pm EDT
Extended Forecast for

Groton CT

  • Tonight

    Tonight: Clear, with a low around 63. Southwest wind 8 to 11 mph.

    Low: 63 °F

    Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 72. Southwest wind 9 to 15 mph.

    High: 72 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers, mainly after 2am. Mostly cloudy, with a low around 62. Southwest wind around 16 mph.

    Low: 62 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Wednesday

    Wednesday: Showers, mainly before 2pm. The rain could be heavy at times. High near 67. Southwest wind around 14 mph becoming north in the afternoon. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

    High: 67 °F

    Heavy Rain

  • Wednesday Night

    Wednesday Night: Mostly cloudy, then gradually becoming clear, with a low around 46. North wind around 15 mph.

    Low: 46 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 44.

    Low: 44 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 63. Southwest wind 8 to 11 mph.
Tuesday
Increasing clouds, with a high near 72. Southwest wind 9 to 15 mph.
Tuesday Night
A 50 percent chance of showers, mainly after 2am. Mostly cloudy, with a low around 62. Southwest wind around 16 mph.
Wednesday
Showers, mainly before 2pm. The rain could be heavy at times. High near 67. Southwest wind around 14 mph becoming north in the afternoon. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Wednesday Night
Mostly cloudy, then gradually becoming clear, with a low around 46. North wind around 15 mph.
Thursday
Sunny, with a high near 57.
Thursday Night
Clear, with a low around 44.
Friday
Sunny, with a high near 59.
Friday Night
Partly cloudy, with a low around 50.
Saturday
Partly sunny, with a high near 62.
Saturday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 54.
Sunday
A 30 percent chance of rain. Partly sunny, with a high near 61. Breezy.
Sunday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 56.
Columbus Day
A 30 percent chance of rain. Partly sunny, with a high near 64.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Groton CT
 41.32°N 72.06°W (Elev. 3 ft)
Last Update:
2:13 pm EDT Oct 6, 2025
Forecast Valid:
5pm EDT Oct 6, 2025-6pm EDT Oct 13, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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