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

32°F

0°C

Humidity 56%
Wind Speed NW 8 mph
Barometer 30.44 in (1030.6 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 15 Mar 5:56 am EDT
Extended Forecast for

Old Saybrook Center CT

  • Today

    Today: Partly sunny, with a high near 42. Light and variable wind becoming southeast 8 to 13 mph in the morning.

    High: 42 °F

    Partly Sunny

  • Tonight

    Tonight: Showers and possibly a thunderstorm, mainly after 5am. Patchy fog after 2am. Temperature falling to near 38 by 8pm, then rising to around 44 during the remainder of the night. Breezy, with an east wind 10 to 15 mph increasing to 16 to 21 mph after midnight. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 38 °F⇑

    Partly Cloudy
    then Showers
    and Patchy
    Fog

  • Monday

    Monday: Intermittent showers and thunderstorms. Patchy fog before noon. Otherwise, cloudy, with a high near 55. Breezy, with a south wind around 25 mph, with gusts as high as 36 mph. Chance of precipitation is 50%.

    High: 55 °F

    Intermittent
    T-storms and
    Patchy Fog

  • Monday Night

    Monday Night: Periods of showers and possibly a thunderstorm before 2am, then showers likely. Some of the storms could produce heavy rainfall. Low around 38. Windy, with a south wind 29 to 34 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 38 °F

    Heavy Rain
    and Windy

  • Tuesday

    Tuesday: Showers likely before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 41. Breezy, with a west wind 18 to 20 mph. Chance of precipitation is 60%.

    High: 41 °F

    Breezy.
    Showers
    Likely then
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 25.

    Low: 25 °F

    Mostly Clear

  • Wednesday

    Wednesday: Increasing clouds, with a high near 36.

    High: 36 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 30.

    Low: 30 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 42.

    High: 42 °F

    Partly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 42. Light and variable wind becoming southeast 8 to 13 mph in the morning.
Tonight
Showers and possibly a thunderstorm, mainly after 5am. Patchy fog after 2am. Temperature falling to near 38 by 8pm, then rising to around 44 during the remainder of the night. Breezy, with an east wind 10 to 15 mph increasing to 16 to 21 mph after midnight. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Intermittent showers and thunderstorms. Patchy fog before noon. Otherwise, cloudy, with a high near 55. Breezy, with a south wind around 25 mph, with gusts as high as 36 mph. Chance of precipitation is 50%.
Monday Night
Periods of showers and possibly a thunderstorm before 2am, then showers likely. Some of the storms could produce heavy rainfall. Low around 38. Windy, with a south wind 29 to 34 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday
Showers likely before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 41. Breezy, with a west wind 18 to 20 mph. Chance of precipitation is 60%.
Tuesday Night
Mostly clear, with a low around 25.
Wednesday
Increasing clouds, with a high near 36.
Wednesday Night
Mostly cloudy, with a low around 30.
Thursday
Partly sunny, with a high near 42.
Thursday Night
Mostly cloudy, with a low around 33.
Friday
Partly sunny, with a high near 46.
Friday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 35.
Saturday
A 50 percent chance of rain. Partly sunny, with a high near 45.
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ABOUT THIS FORECAST

 
Point Forecast:
Old Saybrook Center CT
 41.29°N 72.39°W (Elev. 89 ft)
Last Update:
6:38 am EDT Mar 15, 2026
Forecast Valid:
6am EDT Mar 15, 2026-6pm EDT Mar 21, 2026
 
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Additional Resources

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Chance of Precipitation