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

74°F

23°C

Humidity 74%
Wind Speed SW 14 mph
Barometer 29.79 in (1008.9 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 14 Oct 12:56 pm EDT
Extended Forecast for

Groton CT

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 74. West wind around 13 mph.

    High: 74 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 53. Northwest wind 8 to 11 mph.

    Low: 53 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 63. North wind 5 to 10 mph.

    High: 63 °F

    Sunny

  • Thursday Night

    Thursday Night: Showers likely after 2am. Increasing clouds, with a low around 53. Light southeast wind increasing to 5 to 10 mph after midnight. Chance of precipitation is 60%.

    Low: 53 °F

    Mostly Clear
    then Showers
    Likely

  • Friday

    Friday: Showers, with thunderstorms also possible after 5pm. High near 68. Southwest wind 15 to 17 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 68 °F

    Showers

  • Friday Night

    Friday Night: Showers likely before 2am. Mostly cloudy, with a low around 46. Breezy. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 46 °F

    Showers
    Likely and
    Breezy

  • Saturday

    Saturday: Sunny, with a high near 51. Breezy.

    High: 51 °F

    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 74. West wind around 13 mph.
Tonight
Mostly clear, with a low around 53. Northwest wind 8 to 11 mph.
Thursday
Sunny, with a high near 63. North wind 5 to 10 mph.
Thursday Night
Showers likely after 2am. Increasing clouds, with a low around 53. Light southeast wind increasing to 5 to 10 mph after midnight. Chance of precipitation is 60%.
Friday
Showers, with thunderstorms also possible after 5pm. High near 68. Southwest wind 15 to 17 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Showers likely before 2am. Mostly cloudy, with a low around 46. Breezy. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Sunny, with a high near 51. Breezy.
Saturday Night
Mostly clear, with a low around 37.
Sunday
Sunny, with a high near 58.
Sunday Night
Mostly clear, with a low around 43.
Monday
Sunny, with a high near 62.
Monday Night
Partly cloudy, with a low around 48.
Tuesday
Mostly sunny, with a high near 65.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Groton CT
 41.32°N 72.09°W (Elev. 3 ft)
Last Update:
12:51 pm EDT Oct 14, 2026
Forecast Valid:
1pm EDT Oct 14, 2026-6pm EDT Oct 20, 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