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

70°F

21°C

Humidity 61%
Wind Speed SW 8 mph
Barometer 29.78 in (1008.3 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 16 Apr 4:56 pm EDT
Extended Forecast for

Old Saybrook Center CT

  • Tonight

    Tonight: A 20 percent chance of showers after 11pm. Mostly cloudy, with a low around 54. South wind 5 to 9 mph becoming calm after midnight.

    Low: 54 °F

    Slight Chance
    Showers

  • Friday

    Friday: A slight chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 68. West wind 3 to 6 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 68 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before 8pm, then a slight chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 52. Northeast wind around 6 mph. Chance of precipitation is 60%.

    Low: 52 °F

    Showers
    Likely then
    Slight Chance
    T-storms

  • Saturday

    Saturday: Partly sunny, with a high near 58. Northeast wind around 7 mph becoming southeast in the afternoon.

    High: 58 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 47. Southeast wind 3 to 6 mph.

    Low: 47 °F

    Mostly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: Showers, mainly after 8am. High near 53. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 53 °F

    Showers

  • Sunday Night

    Sunday Night: Showers, mainly before 8pm. Low around 37. Chance of precipitation is 80%.

    Low: 37 °F

    Showers then
    Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 46.

    High: 46 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 33.

    Low: 33 °F

    Mostly Clear

Detailed Forecast

Tonight
A 20 percent chance of showers after 11pm. Mostly cloudy, with a low around 54. South wind 5 to 9 mph becoming calm after midnight.
Friday
A slight chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 68. West wind 3 to 6 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers likely and possibly a thunderstorm before 8pm, then a slight chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 52. Northeast wind around 6 mph. Chance of precipitation is 60%.
Saturday
Partly sunny, with a high near 58. Northeast wind around 7 mph becoming southeast in the afternoon.
Saturday Night
A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 47. Southeast wind 3 to 6 mph.
Sunday
Showers, mainly after 8am. High near 53. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Showers, mainly before 8pm. Low around 37. Chance of precipitation is 80%.
Monday
Mostly sunny, with a high near 46.
Monday Night
Mostly clear, with a low around 33.
Tuesday
Sunny, with a high near 47.
Tuesday Night
Partly cloudy, with a low around 43.
Wednesday
Partly sunny, with a high near 58.
Wednesday Night
Partly cloudy, with a low around 43.
Thursday
Mostly sunny, with a high near 56.
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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:
2:57 pm EDT Apr 16, 2026
Forecast Valid:
5pm EDT Apr 16, 2026-6pm EDT Apr 23, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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