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.

Mostly Cloudy

50°F

10°C

Humidity 86%
Wind Speed S 8 mph
Barometer 30.06 in (1017.8 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Wind Chill47°F (8°C)
Last update 13 May 5:56 am EDT
Extended Forecast for

Groton CT

  • Today

    Today: A slight chance of showers between 8am and 11am. Mostly cloudy, with a high near 58. Breezy, with a south wind 8 to 13 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 20%.

    High: 58 °F

    Slight Chance
    Showers then
    Partly Sunny
    and Breezy

  • Tonight

    Tonight: A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 51. Southeast wind 10 to 16 mph, with gusts as high as 28 mph.

    Low: 51 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: Showers, with thunderstorms also possible after 2pm. High near 58. East wind 6 to 9 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 58 °F

    Showers

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 50. Light and variable wind. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 50 °F

    Showers
    Likely

  • Friday

    Friday: Showers likely, mainly between 8am and 2pm. Mostly cloudy, with a high near 59. North wind around 7 mph. Chance of precipitation is 70%.

    High: 59 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 50.

    Low: 50 °F

    Chance
    Showers then
    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

Detailed Forecast

Today
A slight chance of showers between 8am and 11am. Mostly cloudy, with a high near 58. Breezy, with a south wind 8 to 13 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 20%.
Tonight
A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 51. Southeast wind 10 to 16 mph, with gusts as high as 28 mph.
Thursday
Showers, with thunderstorms also possible after 2pm. High near 58. East wind 6 to 9 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 50. Light and variable wind. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
Showers likely, mainly between 8am and 2pm. Mostly cloudy, with a high near 59. North wind around 7 mph. Chance of precipitation is 70%.
Friday Night
A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 50.
Saturday
Sunny, with a high near 65.
Saturday Night
Mostly clear, with a low around 54.
Sunday
Sunny, with a high near 77.
Sunday Night
Partly cloudy, with a low around 55.
Monday
Mostly sunny, with a high near 74.
Monday Night
Partly cloudy, with a low around 54.
Tuesday
Partly sunny, with a high near 74.
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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:
2:29 am EDT May 13, 2026
Forecast Valid:
6am EDT May 13, 2026-6pm EDT May 19, 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