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

27°F

-3°C

Humidity 78%
Wind Speed N 3 mph
Barometer 30.34 in (1027.4 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Last update 19 Mar 6:56 am EDT
Extended Forecast for

Old Saybrook Center CT

  • Today

    Today: Mostly sunny, with a high near 40. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 40 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 33. South wind 3 to 5 mph.

    Low: 33 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 46. Light and variable wind becoming south 5 to 10 mph in the afternoon.

    High: 46 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Rain likely. Mostly cloudy, with a low around 41. Southwest wind 11 to 13 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 41 °F

    Rain Likely

  • Saturday

    Saturday: Partly sunny, with a high near 51. West wind 8 to 10 mph.

    High: 51 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 30 percent chance of rain after 2pm. Mostly cloudy, with a high near 50.

    High: 50 °F

    Mostly Cloudy
    then Chance
    Rain

  • Sunday Night

    Sunday Night: A chance of rain before 2am, then rain and snow likely. Mostly cloudy, with a low around 37. Chance of precipitation is 60%.

    Low: 37 °F

    Chance Rain
    then
    Rain/Snow
    Likely

  • Monday

    Monday: Rain and snow likely, mainly before 8am. Mostly cloudy, with a high near 44. Chance of precipitation is 60%.

    High: 44 °F

    Rain/Snow
    Likely then
    Chance
    Rain/Snow

Detailed Forecast

Today
Mostly sunny, with a high near 40. Calm wind becoming south 5 to 7 mph in the afternoon.
Tonight
Partly cloudy, with a low around 33. South wind 3 to 5 mph.
Friday
Mostly sunny, with a high near 46. Light and variable wind becoming south 5 to 10 mph in the afternoon.
Friday Night
Rain likely. Mostly cloudy, with a low around 41. Southwest wind 11 to 13 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
Partly sunny, with a high near 51. West wind 8 to 10 mph.
Saturday Night
Mostly cloudy, with a low around 39.
Sunday
A 30 percent chance of rain after 2pm. Mostly cloudy, with a high near 50.
Sunday Night
A chance of rain before 2am, then rain and snow likely. Mostly cloudy, with a low around 37. Chance of precipitation is 60%.
Monday
Rain and snow likely, mainly before 8am. Mostly cloudy, with a high near 44. Chance of precipitation is 60%.
Monday Night
Partly cloudy, with a low around 27.
Tuesday
Mostly sunny, with a high near 40.
Tuesday Night
Partly cloudy, with a low around 31.
Wednesday
Mostly sunny, with a high near 45.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Old Saybrook Center CT
 41.29°N 72.39°W (Elev. 89 ft)
Last Update:
2:26 am EDT Mar 19, 2026
Forecast Valid:
7am EDT Mar 19, 2026-6pm EDT Mar 25, 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