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

50°F

10°C

Humidity 83%
Wind Speed Calm
Barometer 30.09 in (1018.8 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 13 May 2:56 am EDT
Extended Forecast for

Old Saybrook Center CT

  • Overnight

    Overnight: Mostly cloudy, with a low around 48. Southwest wind around 6 mph.

    Low: 48 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers between 8am and 11am. Mostly cloudy, with a high near 58. Breezy, with a south wind 9 to 14 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 20%.

    High: 58 °F

    Slight Chance
    Showers then
    Mostly Cloudy
    and Breezy

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers after 2am. Mostly cloudy, with a low around 50. South wind 8 to 17 mph, with gusts as high as 29 mph.

    Low: 50 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: Showers, with thunderstorms also possible after 2pm. High near 57. East wind 3 to 8 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 57 °F

    Showers

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 49. Calm wind. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 49 °F

    Showers
    Likely

  • Friday

    Friday: Showers likely, mainly between 8am and 2pm. Mostly cloudy, with a high near 58. Chance of precipitation is 70%.

    High: 58 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 50.

    Low: 50 °F

    Chance
    Showers then
    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 48. Southwest wind around 6 mph.
Wednesday
A slight chance of showers between 8am and 11am. Mostly cloudy, with a high near 58. Breezy, with a south wind 9 to 14 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 20%.
Wednesday Night
A 40 percent chance of showers after 2am. Mostly cloudy, with a low around 50. South wind 8 to 17 mph, with gusts as high as 29 mph.
Thursday
Showers, with thunderstorms also possible after 2pm. High near 57. East wind 3 to 8 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 49. Calm wind. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Showers likely, mainly between 8am and 2pm. Mostly cloudy, with a high near 58. Chance of precipitation is 70%.
Friday Night
A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 50.
Saturday
Sunny, with a high near 64.
Saturday Night
Mostly clear, with a low around 55.
Sunday
Sunny, with a high near 81.
Sunday Night
Partly cloudy, with a low around 54.
Monday
Mostly sunny, with a high near 78.
Monday Night
Partly cloudy, with a low around 55.
Tuesday
Mostly sunny, with a high near 79.
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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:
2:29 am EDT May 13, 2026
Forecast Valid:
3am EDT May 13, 2026-6pm EDT May 19, 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