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

62°F

17°C

Humidity 96%
Wind Speed Calm
Barometer 30.14 in (1020.7 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 15 Aug 11:56 pm EDT
Extended Forecast for

Stonington CT

  • Overnight

    Overnight: Clear, with a low around 58. Calm wind.

    Low: 58 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 78. Calm wind becoming south 5 to 8 mph in the afternoon.

    High: 78 °F

    Sunny

  • Sunday Night

    Sunday Night: Showers likely, mainly after 2am. Increasing clouds, with a low around 67. South wind 6 to 9 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 67 °F

    Chance
    Showers then
    Showers
    Likely

  • Monday

    Monday: Showers likely, mainly before 2pm. Mostly cloudy, with a high near 79. South wind 8 to 13 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 79 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 66. Calm wind.

    Low: 66 °F

    Chance
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Tuesday Night

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

    Low: 64 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers after 2am. Partly cloudy, with a low around 67.

    Low: 67 °F

    Mostly Clear
    then Chance
    Showers

Detailed Forecast

Overnight
Clear, with a low around 58. Calm wind.
Sunday
Sunny, with a high near 78. Calm wind becoming south 5 to 8 mph in the afternoon.
Sunday Night
Showers likely, mainly after 2am. Increasing clouds, with a low around 67. South wind 6 to 9 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Monday
Showers likely, mainly before 2pm. Mostly cloudy, with a high near 79. South wind 8 to 13 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 66. Calm wind.
Tuesday
Sunny, with a high near 81.
Tuesday Night
Mostly clear, with a low around 64.
Wednesday
Sunny, with a high near 80.
Wednesday Night
A 30 percent chance of showers after 2am. Partly cloudy, with a low around 67.
Thursday
A 40 percent chance of showers. Partly sunny, with a high near 79.
Thursday Night
Partly cloudy, with a low around 62.
Friday
Mostly sunny, with a high near 76.
Friday Night
Partly cloudy, with a low around 60.
Saturday
Mostly sunny, with a high near 75.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Stonington CT
 41.35°N 71.93°W (Elev. 3 ft)
Last Update:
2:28 pm EDT Aug 15, 2026
Forecast Valid:
12am EDT Aug 16, 2026-6pm EDT Aug 22, 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