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

73°F

23°C

Humidity 71%
Wind Speed Vrbl 3 mph
Barometer 30.07 in (1018.0 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 26 Aug 9:56 am EDT
Extended Forecast for

Groton CT

  • Today

    Today: Sunny, with a high near 74. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 74 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 67. Southwest wind 3 to 6 mph.

    Low: 67 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly sunny, with a high near 75. South wind 6 to 13 mph.

    High: 75 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. South wind 5 to 9 mph. Chance of precipitation is 50%.

    Low: 69 °F

    Chance
    Showers

  • Friday

    Friday: A slight chance of showers before 11am, then a slight chance of showers and thunderstorms between 11am and 2pm, then a slight chance of showers after 2pm. Partly sunny, with a high near 76. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 20%.

    High: 76 °F

    Slight Chance
    T-storms

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 65.

    Low: 65 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 74. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Tonight
Increasing clouds, with a low around 67. Southwest wind 3 to 6 mph.
Thursday
Mostly sunny, with a high near 75. South wind 6 to 13 mph.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. South wind 5 to 9 mph. Chance of precipitation is 50%.
Friday
A slight chance of showers before 11am, then a slight chance of showers and thunderstorms between 11am and 2pm, then a slight chance of showers after 2pm. Partly sunny, with a high near 76. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 20%.
Friday Night
Mostly cloudy, with a low around 65.
Saturday
Mostly sunny, with a high near 74.
Saturday Night
Partly cloudy, with a low around 63.
Sunday
Sunny, with a high near 75.
Sunday Night
Partly cloudy, with a low around 68.
Monday
Mostly sunny, with a high near 80.
Monday Night
Partly cloudy, with a low around 68.
Tuesday
Mostly sunny, with a high near 78.
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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:
2:49 am EDT Aug 26, 2026
Forecast Valid:
10am EDT Aug 26, 2026-6pm EDT Sep 1, 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