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

73°F

23°C

Humidity 57%
Wind Speed SW 12 mph
Barometer 30.18 in (1021.8 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 29 Aug 3:56 pm EDT
Extended Forecast for

Old Saybrook Center CTSimilar City Names

  • Tonight

    Tonight: Mostly clear, with a low around 63. Southwest wind around 5 mph becoming calm in the evening.

    Low: 63 °F

    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 80. Light west wind becoming southwest 5 to 9 mph in the morning.

    High: 80 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 50%.

    Low: 65 °F

    Chance
    Showers

  • Monday

    Monday: Cloudy through mid morning, then clearing, with a high near 78. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 78 °F

    Clearing

  • Monday Night

    Monday Night: A 40 percent chance of showers after 2am. Mostly cloudy, with a low around 65. Calm wind.

    Low: 65 °F

    Partly Cloudy
    then Chance
    Showers

  • Tuesday

    Tuesday: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 77. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 77 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely before 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.

    Low: 66 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A 40 percent chance of showers after 2pm. Mostly cloudy, with a high near 78.

    High: 78 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 67.

    Low: 67 °F

    Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 63. Southwest wind around 5 mph becoming calm in the evening.
Sunday
Increasing clouds, with a high near 80. Light west wind becoming southwest 5 to 9 mph in the morning.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 50%.
Monday
Cloudy through mid morning, then clearing, with a high near 78. Calm wind becoming southeast around 5 mph in the afternoon.
Monday Night
A 40 percent chance of showers after 2am. Mostly cloudy, with a low around 65. Calm wind.
Tuesday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 77. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
Showers likely before 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Wednesday
A 40 percent chance of showers after 2pm. Mostly cloudy, with a high near 78.
Wednesday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 67.
Thursday
A 40 percent chance of showers. Mostly cloudy, with a high near 80.
Thursday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 64.
Friday
Mostly sunny, with a high near 77.
Friday Night
Partly cloudy, with a low around 61.
Saturday
Mostly sunny, with a high near 75.
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ABOUT THIS FORECAST

 
Point Forecast:
Old Saybrook Center CTSimilar City Names
 41.29°N 72.36°W (Elev. 3 ft)
Last Update:
2:24 pm EDT Aug 29, 2026
Forecast Valid:
4pm EDT Aug 29, 2026-6pm EDT Sep 5, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation