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

64°F

18°C

Humidity 90%
Wind Speed Calm
Barometer 30.15 in (1020.8 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 15 Aug 9:56 pm EDT
Extended Forecast for

Groton CTSimilar City Names

  • Tonight

    Tonight: Mostly clear, with a low around 62. Light north wind.

    Low: 62 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 76. Calm wind becoming south 5 to 8 mph in the afternoon.

    High: 76 °F

    Sunny

  • Sunday Night

    Sunday Night: Showers likely, mainly after 2am. Increasing clouds, with a low around 69. South wind 8 to 15 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 69 °F

    Chance
    Showers then
    Showers
    Likely

  • Monday

    Monday: Showers likely, mainly before 2pm. Mostly cloudy, with a high near 77. South wind 8 to 15 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 77 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 68. Light north wind.

    Low: 68 °F

    Chance
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers after 2am. Partly cloudy, with a low around 68.

    Low: 68 °F

    Mostly Clear
    then Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 62. Light north wind.
Sunday
Sunny, with a high near 76. Calm wind becoming south 5 to 8 mph in the afternoon.
Sunday Night
Showers likely, mainly after 2am. Increasing clouds, with a low around 69. South wind 8 to 15 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Monday
Showers likely, mainly before 2pm. Mostly cloudy, with a high near 77. South wind 8 to 15 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 68. Light north wind.
Tuesday
Sunny, with a high near 79.
Tuesday Night
Mostly clear, with a low around 65.
Wednesday
Sunny, with a high near 82.
Wednesday Night
A 30 percent chance of showers after 2am. Partly cloudy, with a low around 68.
Thursday
A 40 percent chance of showers. Partly sunny, with a high near 81.
Thursday Night
Partly cloudy, with a low around 62.
Friday
Mostly sunny, with a high near 78.
Friday Night
Partly cloudy, with a low around 61.
Saturday
Mostly sunny, with a high near 77.
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ABOUT THIS FORECAST

 
Point Forecast:
Groton CTSimilar City Names
 41.32°N 72.09°W (Elev. 3 ft)
Last Update:
2:28 pm EDT Aug 15, 2026
Forecast Valid:
10pm EDT Aug 15, 2026-6pm EDT Aug 22, 2026
 
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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