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

66°F

19°C

Humidity 100%
Wind Speed S 9 mph
Barometer 29.82 in (1009.7 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 25 Sep 3:56 pm EDT
Extended Forecast for

Groton CTSimilar City Names

  • This Afternoon

    This Afternoon: Showers and possibly a thunderstorm. High near 71. South wind 11 to 13 mph. Chance of precipitation is 80%.

    High: 71 °F

    Showers

  • Tonight

    Tonight: Showers and possibly a thunderstorm, mainly before 2am, then a chance of showers and thunderstorms after 2am. Low around 68. South wind 11 to 14 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 68 °F

    Showers then
    Showers
    Likely

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 75. West wind around 7 mph.

    High: 75 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Partly cloudy, with a low around 63. West wind around 5 mph becoming north after midnight.

    Low: 63 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 73. North wind 5 to 7 mph becoming south in the afternoon.

    High: 73 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of showers after 2am. Mostly cloudy, with a low around 64.

    Low: 64 °F

    Mostly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: A 30 percent chance of showers before 2pm. Mostly cloudy, with a high near 71.

    High: 71 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 62.

    Low: 62 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 73.

    High: 73 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. High near 71. South wind 11 to 13 mph. Chance of precipitation is 80%.
Tonight
Showers and possibly a thunderstorm, mainly before 2am, then a chance of showers and thunderstorms after 2am. Low around 68. South wind 11 to 14 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 75. West wind around 7 mph.
Friday Night
Partly cloudy, with a low around 63. West wind around 5 mph becoming north after midnight.
Saturday
Partly sunny, with a high near 73. North wind 5 to 7 mph becoming south in the afternoon.
Saturday Night
A 40 percent chance of showers after 2am. Mostly cloudy, with a low around 64.
Sunday
A 30 percent chance of showers before 2pm. Mostly cloudy, with a high near 71.
Sunday Night
Mostly cloudy, with a low around 62.
Monday
Partly sunny, with a high near 73.
Monday Night
Mostly cloudy, with a low around 63.
Tuesday
Partly sunny, with a high near 71.
Tuesday Night
Mostly cloudy, with a low around 56.
Wednesday
Mostly sunny, with a high near 63.
Wednesday Night
Mostly clear, with a low around 49.
Thursday
Sunny, with a high near 62.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Groton CTSimilar City Names
 41.32°N 72.09°W (Elev. 3 ft)
Last Update:
2:05 pm EDT Sep 25, 2025
Forecast Valid:
4pm EDT Sep 25, 2025-6pm EDT Oct 2, 2025
 
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Additional Resources

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Chance of Precipitation