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

61°F

16°C

Humidity 78%
Wind Speed NE 7 mph
Barometer 30.21 in (1023.0 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 18 Aug 10:56 pm EDT
Extended Forecast for

Groton CT

  • Tonight

    Tonight: Mostly clear, with a low around 57. Northeast wind around 8 mph.

    Low: 57 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 71. Northeast wind 8 to 11 mph becoming southeast in the afternoon.

    High: 71 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 60. Southeast wind 6 to 8 mph.

    Low: 60 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers after 2pm. Partly sunny, with a high near 70. East wind 7 to 10 mph.

    High: 70 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers before 2am. Partly cloudy, with a low around 62. Northeast wind around 10 mph.

    Low: 62 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Friday Night

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

    Low: 65 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 57. Northeast wind around 8 mph.
Tuesday
Mostly sunny, with a high near 71. Northeast wind 8 to 11 mph becoming southeast in the afternoon.
Tuesday Night
Partly cloudy, with a low around 60. Southeast wind 6 to 8 mph.
Wednesday
A 20 percent chance of showers after 2pm. Partly sunny, with a high near 70. East wind 7 to 10 mph.
Wednesday Night
A 20 percent chance of showers before 2am. Partly cloudy, with a low around 62. Northeast wind around 10 mph.
Thursday
Mostly sunny, with a high near 74.
Thursday Night
Partly cloudy, with a low around 61.
Friday
Sunny, with a high near 75.
Friday Night
Mostly clear, with a low around 65.
Saturday
Sunny, with a high near 75.
Saturday Night
Partly cloudy, with a low around 69.
Sunday
A 30 percent chance of showers. Partly sunny, with a high near 75.
Sunday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 67.
Monday
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 72.09°W (Elev. 3 ft)
Last Update:
2:53 pm EDT Aug 18, 2025
Forecast Valid:
11pm EDT Aug 18, 2025-6pm EDT Aug 25, 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