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.

Overcast

64°F

18°C

Humidity 65%
Wind Speed E 9 mph
Barometer 30.23 in (1023.6 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 4 Oct 12:56 pm EDT
Extended Forecast for

Groton CT

  • This Afternoon

    This Afternoon: Showers likely, mainly after 4pm. Cloudy, with a high near 63. East wind around 11 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 63 °F

    Showers
    Likely

  • Tonight

    Tonight: Showers likely, mainly before midnight. Mostly cloudy, with a low around 55. Northeast wind 5 to 9 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 55 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Monday

    Monday: Partly sunny, then gradually becoming sunny, with a high near 67. West wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon.

    High: 67 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 46. Northwest wind around 15 mph.

    Low: 46 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 60. Northwest wind around 14 mph.

    High: 60 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 48.

    Low: 48 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

Detailed Forecast

This Afternoon
Showers likely, mainly after 4pm. Cloudy, with a high near 63. East wind around 11 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Showers likely, mainly before midnight. Mostly cloudy, with a low around 55. Northeast wind 5 to 9 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Partly sunny, then gradually becoming sunny, with a high near 67. West wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon.
Monday Night
Clear, with a low around 46. Northwest wind around 15 mph.
Tuesday
Sunny, with a high near 60. Northwest wind around 14 mph.
Tuesday Night
Clear, with a low around 48.
Wednesday
Sunny, with a high near 64.
Wednesday Night
Mostly clear, with a low around 55.
Thursday
Sunny, with a high near 68.
Thursday Night
Mostly clear, with a low around 53.
Friday
Sunny, with a high near 67.
Friday Night
Mostly clear, with a low around 52.
Saturday
Mostly sunny, with a high near 65.
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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:
10:11 am EDT Oct 4, 2026
Forecast Valid:
1pm EDT Oct 4, 2026-6pm EDT Oct 10, 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