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

40°F

4°C

Humidity 86%
Wind Speed Calm
Barometer 30.05 in (1017.6 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 28 Feb 5:56 pm EST
Extended Forecast for

Old Saybrook Center CT

  • Tonight

    Tonight: Increasing clouds, with a low around 27. Calm wind becoming north around 6 mph after midnight.

    Low: 27 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Snow likely, mainly before 1pm. Cloudy, with a high near 37. Wind chill values between 20 and 30. North wind 7 to 10 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 37 °F

    Snow Likely

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 13. Wind chill values between zero and 5. North wind 9 to 11 mph.

    Low: 13 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 29. Wind chill values between zero and 10. North wind 5 to 9 mph.

    High: 29 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 19. Calm wind becoming south around 6 mph after midnight.

    Low: 19 °F

    Mostly Clear

  • Tuesday

    Tuesday: Rain likely after 1pm. Increasing clouds, with a high near 41. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 41 °F

    Partly Sunny
    then Rain
    Likely

  • Tuesday Night

    Tuesday Night: Rain. Low around 38. Chance of precipitation is 90%.

    Low: 38 °F

    Rain

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 46.

    High: 46 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain after 1am. Cloudy, with a low around 36.

    Low: 36 °F

    Mostly Cloudy
    then Chance
    Rain

Detailed Forecast

Tonight
Increasing clouds, with a low around 27. Calm wind becoming north around 6 mph after midnight.
Sunday
Snow likely, mainly before 1pm. Cloudy, with a high near 37. Wind chill values between 20 and 30. North wind 7 to 10 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Sunday Night
Mostly clear, with a low around 13. Wind chill values between zero and 5. North wind 9 to 11 mph.
Monday
Sunny, with a high near 29. Wind chill values between zero and 10. North wind 5 to 9 mph.
Monday Night
Mostly clear, with a low around 19. Calm wind becoming south around 6 mph after midnight.
Tuesday
Rain likely after 1pm. Increasing clouds, with a high near 41. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
Rain. Low around 38. Chance of precipitation is 90%.
Wednesday
Mostly cloudy, with a high near 46.
Wednesday Night
A 40 percent chance of rain after 1am. Cloudy, with a low around 36.
Thursday
A 40 percent chance of rain. Cloudy, with a high near 48.
Thursday Night
A 50 percent chance of rain. Cloudy, with a low around 41.
Friday
A 50 percent chance of rain. Cloudy, with a high near 47.
Friday Night
A 30 percent chance of rain. Cloudy, with a low around 40.
Saturday
Mostly cloudy, with a high near 52.
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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:
3:08 pm EST Feb 28, 2026
Forecast Valid:
6pm EST Feb 28, 2026-6pm EST Mar 7, 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