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.

Fog/Mist

30°F

-1°C

Humidity 100%
Wind Speed Calm
Barometer 30.25 in (1024.5 mb)
Dewpoint 30°F (-1°C)
Visibility 0.75 mi
Last update 4 Mar 9:56 pm EST
Extended Forecast for

Old Saybrook Center CT

  • Tonight

    Tonight: A slight chance of freezing rain after 4am. Patchy fog after 1am. Otherwise, mostly cloudy, with a steady temperature around 35. Calm wind. Chance of precipitation is 20%.

    Low: 35 °F

    Slight Chance
    Freezing Rain
    and Patchy
    Fog

  • Thursday

    Thursday: Rain likely, possibly mixed with freezing rain, becoming all rain after 7am. Patchy fog before 1pm. Otherwise, cloudy, with a high near 41. Calm wind becoming east 5 to 9 mph in the afternoon. Chance of precipitation is 70%. Little or no ice accumulation expected.

    High: 41 °F

    Rain/Freezing
    Rain Likely
    and Patchy
    Fog

  • Thursday Night

    Thursday Night: Rain. Low around 34. Northeast wind around 14 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

    Low: 34 °F

    Rain

  • Friday

    Friday: A 40 percent chance of rain before 1pm. Cloudy, with a steady temperature around 37. Northeast wind 9 to 13 mph.

    High: 37 °F

    Chance Rain

  • Friday Night

    Friday Night: Cloudy, with a low around 35. Northeast wind around 6 mph becoming calm in the evening.

    Low: 35 °F

    Cloudy

  • Saturday

    Saturday: Cloudy, with a high near 48.

    High: 48 °F

    Cloudy

  • Saturday Night

    Saturday Night: Showers likely, mainly before 1am. Cloudy, with a low around 42. Chance of precipitation is 60%.

    Low: 42 °F

    Showers
    Likely

  • Sunday

    Sunday: Partly sunny, with a high near 51.

    High: 51 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

Detailed Forecast

Tonight
A slight chance of freezing rain after 4am. Patchy fog after 1am. Otherwise, mostly cloudy, with a steady temperature around 35. Calm wind. Chance of precipitation is 20%.
Thursday
Rain likely, possibly mixed with freezing rain, becoming all rain after 7am. Patchy fog before 1pm. Otherwise, cloudy, with a high near 41. Calm wind becoming east 5 to 9 mph in the afternoon. Chance of precipitation is 70%. Little or no ice accumulation expected.
Thursday Night
Rain. Low around 34. Northeast wind around 14 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Friday
A 40 percent chance of rain before 1pm. Cloudy, with a steady temperature around 37. Northeast wind 9 to 13 mph.
Friday Night
Cloudy, with a low around 35. Northeast wind around 6 mph becoming calm in the evening.
Saturday
Cloudy, with a high near 48.
Saturday Night
Showers likely, mainly before 1am. Cloudy, with a low around 42. Chance of precipitation is 60%.
Sunday
Partly sunny, with a high near 51.
Sunday Night
Partly cloudy, with a low around 39.
Monday
Sunny, with a high near 51.
Monday Night
Partly cloudy, with a low around 43.
Tuesday
Partly sunny, with a high near 55.
Tuesday Night
Mostly cloudy, with a low around 47.
Wednesday
A 30 percent chance of rain. Mostly cloudy, with a high near 55.
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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:
9:52 pm EST Mar 4, 2026
Forecast Valid:
10pm EST Mar 4, 2026-6pm EDT Mar 11, 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