National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Groton / New London, Groton / New London Airport (KGON)

Lat: 41.33°NLon: 72.05°WElev: 10ft.

Partly Cloudy

70°F

21°C

Humidity 97%
Wind Speed NW 5 mph
Barometer 30.01 in (1016.1 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 18 Sep 5:56 am EDT
Extended Forecast for

Groton CT

  • Today

    Today: Mostly sunny, with a high near 77. Northwest wind 6 to 8 mph.

    High: 77 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 55. North wind 8 to 11 mph.

    Low: 55 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 66. North wind 5 to 9 mph becoming southeast in the afternoon.

    High: 66 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 58. East wind around 5 mph.

    Low: 58 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 66. Southeast wind 6 to 10 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 66 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers. Low around 60. Chance of precipitation is 80%. New precipitation amounts between 1 and 2 inches possible.

    Low: 60 °F

    Showers

  • Monday

    Monday: Showers likely, mainly before 8am. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.

    High: 65 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 53.

    Low: 53 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A 40 percent chance of showers. Mostly cloudy, with a high near 62. Breezy.

    High: 62 °F

    Chance
    Showers and
    Breezy

Detailed Forecast

Today
Mostly sunny, with a high near 77. Northwest wind 6 to 8 mph.
Tonight
Partly cloudy, with a low around 55. North wind 8 to 11 mph.
Saturday
Mostly sunny, with a high near 66. North wind 5 to 9 mph becoming southeast in the afternoon.
Saturday Night
Increasing clouds, with a low around 58. East wind around 5 mph.
Sunday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 66. Southeast wind 6 to 10 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Showers. Low around 60. Chance of precipitation is 80%. New precipitation amounts between 1 and 2 inches possible.
Monday
Showers likely, mainly before 8am. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.
Monday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 53.
Tuesday
A 40 percent chance of showers. Mostly cloudy, with a high near 62. Breezy.
Tuesday Night
Mostly cloudy, with a low around 52. Breezy.
Wednesday
Partly sunny, with a high near 63. Breezy.
Wednesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 53. Breezy.
Thursday
A 30 percent chance of showers. Partly sunny, with a high near 65. Breezy.
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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:
5:16 am EDT Sep 18, 2026
Forecast Valid:
6am EDT Sep 18, 2026-6pm EDT Sep 24, 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