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

54°F

12°C

Humidity 100%
Wind Speed N 3 mph
Barometer 30.22 in (1023.2 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 1 Sep 3:56 am EDT
Extended Forecast for

Groton CT

  • Labor Day

    Labor Day: Mostly cloudy, with a high near 73. North wind 7 to 11 mph becoming east in the afternoon.

    High: 73 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 58. North wind around 7 mph.

    Low: 58 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Sunny, with a high near 72. North wind around 7 mph becoming southeast in the afternoon.

    High: 72 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 59. Southeast wind around 5 mph becoming calm in the evening.

    Low: 59 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 72. Light west wind becoming south 5 to 9 mph in the morning.

    High: 72 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers after 2am. Partly cloudy, with a low around 66.

    Low: 66 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: A 50 percent chance of showers. Partly sunny, with a high near 73.

    High: 73 °F

    Chance
    Showers

Detailed Forecast

Labor Day
Mostly cloudy, with a high near 73. North wind 7 to 11 mph becoming east in the afternoon.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 58. North wind around 7 mph.
Tuesday
Sunny, with a high near 72. North wind around 7 mph becoming southeast in the afternoon.
Tuesday Night
Mostly clear, with a low around 59. Southeast wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 72. Light west wind becoming south 5 to 9 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 62.
Thursday
Sunny, with a high near 72.
Thursday Night
A 30 percent chance of showers after 2am. Partly cloudy, with a low around 66.
Friday
A 50 percent chance of showers. Partly sunny, with a high near 73.
Friday Night
A 30 percent chance of showers before 2am. Mostly cloudy, with a low around 65.
Saturday
Mostly sunny, with a high near 74.
Saturday Night
Partly cloudy, with a low around 61.
Sunday
Mostly sunny, with a high near 71.
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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:
2:20 am EDT Sep 1, 2025
Forecast Valid:
4am EDT Sep 1, 2025-6pm EDT Sep 7, 2025
 
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