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.

Light Rain

59°F

15°C

Humidity 69%
Wind Speed E 7 mph
Barometer 30.31 in (1026.5 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 11 Oct 12:56 pm EDT
Extended Forecast for

Groton CT

  • This Afternoon

    This Afternoon: Rain, mainly after 2pm. High near 63. Southeast wind 13 to 16 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 63 °F

    Rain

  • Tonight

    Tonight: Rain and possibly a thunderstorm before 2am, then a chance of rain and thunderstorms, mainly between 2am and 5am. Steady temperature around 60. East wind 15 to 18 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 60 °F

    Rain

  • Columbus Day

    Columbus Day: A slight chance of rain before 8am, then a slight chance of showers between 8am and 11am. Mostly cloudy through mid morning, then gradual clearing, with a high near 68. North wind 8 to 15 mph. Chance of precipitation is 20%.

    High: 68 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 55. Calm wind becoming north around 5 mph after midnight.

    Low: 55 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 65. Northeast wind 7 to 10 mph becoming south in the afternoon.

    High: 65 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers. Mostly cloudy, with a steady temperature around 64.

    Low: 64 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 70.

    High: 70 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 50.

    Low: 50 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

Detailed Forecast

This Afternoon
Rain, mainly after 2pm. High near 63. Southeast wind 13 to 16 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Tonight
Rain and possibly a thunderstorm before 2am, then a chance of rain and thunderstorms, mainly between 2am and 5am. Steady temperature around 60. East wind 15 to 18 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Columbus Day
A slight chance of rain before 8am, then a slight chance of showers between 8am and 11am. Mostly cloudy through mid morning, then gradual clearing, with a high near 68. North wind 8 to 15 mph. Chance of precipitation is 20%.
Monday Night
Mostly clear, with a low around 55. Calm wind becoming north around 5 mph after midnight.
Tuesday
Partly sunny, with a high near 65. Northeast wind 7 to 10 mph becoming south in the afternoon.
Tuesday Night
A 30 percent chance of showers. Mostly cloudy, with a steady temperature around 64.
Wednesday
Mostly sunny, with a high near 70.
Wednesday Night
Mostly clear, with a low around 50.
Thursday
Sunny, with a high near 63.
Thursday Night
Partly cloudy, with a low around 48.
Friday
A 50 percent chance of showers. Mostly cloudy, with a high near 64.
Friday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 50. Breezy.
Saturday
A 30 percent chance of showers. Partly sunny, with a high near 59. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Groton CT
 41.32°N 72.06°W (Elev. 3 ft)
Last Update:
11:12 am EDT Oct 11, 2026
Forecast Valid:
1pm EDT Oct 11, 2026-6pm EDT Oct 17, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation