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.

Light Rain

37°F

3°C

Humidity 89%
Wind Speed NE 15 mph
Barometer 30.30 in (1026.1 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill28°F (-2°C)
Last update 5 Mar 8:56 pm EST
Extended Forecast for

Old Saybrook Center CT

  • Tonight

    Tonight: Rain. Low around 36. Northeast wind around 14 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 36 °F

    Rain

  • Friday

    Friday: Rain likely, mainly before 7am. Cloudy, with a high near 41. Northeast wind 9 to 13 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 41 °F

    Rain Likely
    then Mostly
    Cloudy

  • Friday Night

    Friday Night: Patchy fog. Otherwise, cloudy, with a low around 36. Northeast wind around 6 mph becoming calm after midnight.

    Low: 36 °F

    Patchy Fog

  • Saturday

    Saturday: Cloudy, with a high near 47. Calm wind becoming south 5 to 8 mph in the morning.

    High: 47 °F

    Cloudy

  • Saturday Night

    Saturday Night: Rain likely, mainly after 1am. Cloudy, with a temperature falling to near 44 by 9pm, then rising to around 48 during the remainder of the night. South wind 9 to 11 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 44 °F⇑

    Rain Likely

  • Sunday

    Sunday: Cloudy, then gradually becoming mostly sunny, with a high near 54.

    High: 54 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 40.

    Low: 40 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 54.

    High: 54 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

Detailed Forecast

Tonight
Rain. Low around 36. Northeast wind around 14 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Friday
Rain likely, mainly before 7am. Cloudy, with a high near 41. Northeast wind 9 to 13 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Patchy fog. Otherwise, cloudy, with a low around 36. Northeast wind around 6 mph becoming calm after midnight.
Saturday
Cloudy, with a high near 47. Calm wind becoming south 5 to 8 mph in the morning.
Saturday Night
Rain likely, mainly after 1am. Cloudy, with a temperature falling to near 44 by 9pm, then rising to around 48 during the remainder of the night. South wind 9 to 11 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Cloudy, then gradually becoming mostly sunny, with a high near 54.
Sunday Night
Partly cloudy, with a low around 40.
Monday
Mostly sunny, with a high near 54.
Monday Night
Partly cloudy, with a low around 44.
Tuesday
Mostly sunny, with a high near 57.
Tuesday Night
Mostly cloudy, with a low around 43.
Wednesday
A 30 percent chance of rain. Mostly cloudy, with a high near 54.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.
Thursday
A 50 percent chance of rain. Mostly cloudy, with a high near 48.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Old Saybrook Center CT
 41.29°N 72.39°W (Elev. 89 ft)
Last Update:
1:01 pm EST Mar 5, 2026
Forecast Valid:
9pm EST Mar 5, 2026-6pm EDT Mar 12, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation