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

69°F

21°C

Humidity 96%
Wind Speed NE 5 mph
Barometer 29.87 in (1011.6 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 3 Sep 11:56 pm EDT
Extended Forecast for

Groton CT

  • Overnight

    Overnight: A 20 percent chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 69. Light west wind.

    Low: 69 °F

    Slight Chance
    T-storms

  • Friday

    Friday: Mostly sunny, with a high near 80. Light and variable wind becoming west 5 to 8 mph in the morning.

    High: 80 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 64. North wind around 6 mph.

    Low: 64 °F

    Mostly Clear

  • Saturday

    Saturday: A 40 percent chance of showers after 2pm. Increasing clouds, with a high near 75. North wind 6 to 8 mph.

    High: 75 °F

    Sunny then
    Chance
    Showers

  • Saturday Night

    Saturday Night: A 30 percent chance of showers before 2am. Mostly cloudy, with a low around 61. Northeast wind around 7 mph.

    Low: 61 °F

    Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 71.

    High: 71 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 69. Light west wind.
Friday
Mostly sunny, with a high near 80. Light and variable wind becoming west 5 to 8 mph in the morning.
Friday Night
Mostly clear, with a low around 64. North wind around 6 mph.
Saturday
A 40 percent chance of showers after 2pm. Increasing clouds, with a high near 75. North wind 6 to 8 mph.
Saturday Night
A 30 percent chance of showers before 2am. Mostly cloudy, with a low around 61. Northeast wind around 7 mph.
Sunday
Mostly sunny, with a high near 71.
Sunday Night
Mostly clear, with a low around 57.
Labor Day
Sunny, with a high near 74.
Monday Night
Mostly clear, with a low around 60.
Tuesday
Sunny, with a high near 75.
Tuesday Night
Partly cloudy, with a low around 61.
Wednesday
Mostly sunny, with a high near 73.
Wednesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 66.
Thursday
A 30 percent chance of showers. Partly sunny, with a high near 76.
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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:
2:25 pm EDT Sep 3, 2026
Forecast Valid:
12am EDT Sep 4, 2026-6pm EDT Sep 10, 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