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.

Partly Cloudy

64°F

18°C

Humidity 93%
Wind Speed N 14 mph
Barometer 29.98 in (1015.3 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 8 Jul 1:56 am EDT
Extended Forecast for

Groton CT

  • Overnight

    Overnight: Partly cloudy, with a low around 62. North wind around 9 mph.

    Low: 62 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 75. North wind 5 to 7 mph becoming southwest in the afternoon.

    High: 75 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 66. Southwest wind around 6 mph.

    Low: 66 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 78. West wind 7 to 13 mph.

    High: 78 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms. Increasing clouds, with a low around 68. Southwest wind 5 to 9 mph. Chance of precipitation is 20%.

    Low: 68 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Friday

    Friday: A chance of showers between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 80. Chance of precipitation is 50%.

    High: 80 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 67.

    Low: 67 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 62. North wind around 9 mph.
Wednesday
Sunny, with a high near 75. North wind 5 to 7 mph becoming southwest in the afternoon.
Wednesday Night
Mostly clear, with a low around 66. Southwest wind around 6 mph.
Thursday
Mostly sunny, with a high near 78. West wind 7 to 13 mph.
Thursday Night
A slight chance of showers and thunderstorms. Increasing clouds, with a low around 68. Southwest wind 5 to 9 mph. Chance of precipitation is 20%.
Friday
A chance of showers between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 80. Chance of precipitation is 50%.
Friday Night
A 30 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 67.
Saturday
Mostly sunny, with a high near 78.
Saturday Night
Mostly clear, with a low around 64.
Sunday
Sunny, with a high near 80.
Sunday Night
Partly cloudy, with a low around 66.
Monday
Mostly sunny, with a high near 80.
Monday Night
Partly cloudy, with a low around 67.
Tuesday
Sunny, with a high near 82.
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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:
2:30 am EDT Jul 8, 2026
Forecast Valid:
2am EDT Jul 8, 2026-6pm EDT Jul 14, 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