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

64°F

18°C

Humidity 78%
Wind Speed N 5 mph
Barometer 30.02 in (1016.5 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 22 Jun 6:56 am EDT
Extended Forecast for

Groton CTSimilar City Names

  • Today

    Today: Showers likely and possibly a thunderstorm, mainly after 5pm. Increasing clouds, with a high near 70. Calm wind becoming southeast 5 to 8 mph in the morning. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 70 °F

    Partly Sunny
    then Showers
    Likely

  • Tonight

    Tonight: Showers and possibly a thunderstorm. Low around 63. South wind around 11 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 63 °F

    Showers

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm before 2pm, then a chance of showers. Mostly cloudy, with a high near 73. South wind around 7 mph becoming northwest in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 73 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 62. Northwest wind 5 to 7 mph.

    Low: 62 °F

    Chance
    Showers then
    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 77. West wind 6 to 9 mph.

    High: 77 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of showers after 2am. Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: A 50 percent chance of showers. Partly sunny, with a high near 72.

    High: 72 °F

    Chance
    Showers

Detailed Forecast

Today
Showers likely and possibly a thunderstorm, mainly after 5pm. Increasing clouds, with a high near 70. Calm wind becoming southeast 5 to 8 mph in the morning. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and possibly a thunderstorm. Low around 63. South wind around 11 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
Showers likely and possibly a thunderstorm before 2pm, then a chance of showers. Mostly cloudy, with a high near 73. South wind around 7 mph becoming northwest in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday Night
A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 62. Northwest wind 5 to 7 mph.
Wednesday
Sunny, with a high near 77. West wind 6 to 9 mph.
Wednesday Night
Mostly clear, with a low around 61.
Thursday
Sunny, with a high near 76.
Thursday Night
A 40 percent chance of showers after 2am. Partly cloudy, with a low around 64.
Friday
A 50 percent chance of showers. Partly sunny, with a high near 72.
Friday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 65.
Saturday
Mostly sunny, with a high near 74.
Saturday Night
Partly cloudy, with a low around 65.
Sunday
Sunny, with a high near 75.
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ABOUT THIS FORECAST

 
Point Forecast:
Groton CTSimilar City Names
 41.32°N 72.09°W (Elev. 3 ft)
Last Update:
7:08 am EDT Jun 22, 2026
Forecast Valid:
7am EDT Jun 22, 2026-6pm EDT Jun 28, 2026
 
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Additional Resources

Radar & Satellite Image

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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