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

69°F

21°C

Humidity 81%
Wind Speed SW 10 mph
Barometer 30.29 in (1025.6 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 16 Sep 6:56 pm EDT
Extended Forecast for

Old Saybrook Center CT

  • Tonight

    Tonight: Patchy fog after 8pm. Otherwise, partly cloudy, with a low around 63. Southwest wind around 5 mph becoming calm in the evening.

    Low: 63 °F

    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 78. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 78 °F

    Patchy Fog
    then Partly
    Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of showers, mainly before 5am. Mostly cloudy, with a low around 66. Southwest wind around 6 mph.

    Low: 66 °F

    Chance
    Showers

  • Friday

    Friday: Partly sunny through mid morning, then becoming sunny, with a high near 79. North wind 6 to 8 mph.

    High: 79 °F

    Becoming
    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 53. North wind 5 to 7 mph.

    Low: 53 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

  • Saturday Night

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

    Low: 55 °F

    Mostly Cloudy

  • Sunday

    Sunday: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 70. Chance of precipitation is 70%.

    High: 70 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely, mainly before 2am. Mostly cloudy, with a low around 55. Chance of precipitation is 60%.

    Low: 55 °F

    Showers
    Likely

Detailed Forecast

Tonight
Patchy fog after 8pm. Otherwise, partly cloudy, with a low around 63. Southwest wind around 5 mph becoming calm in the evening.
Thursday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 78. Calm wind becoming south 5 to 7 mph in the afternoon.
Thursday Night
A 40 percent chance of showers, mainly before 5am. Mostly cloudy, with a low around 66. Southwest wind around 6 mph.
Friday
Partly sunny through mid morning, then becoming sunny, with a high near 79. North wind 6 to 8 mph.
Friday Night
Partly cloudy, with a low around 53. North wind 5 to 7 mph.
Saturday
Mostly sunny, with a high near 68.
Saturday Night
Mostly cloudy, with a low around 55.
Sunday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 70. Chance of precipitation is 70%.
Sunday Night
Showers likely, mainly before 2am. Mostly cloudy, with a low around 55. Chance of precipitation is 60%.
Monday
A 30 percent chance of showers. Partly sunny, with a high near 69.
Monday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 54.
Tuesday
A 30 percent chance of showers. Mostly cloudy, with a high near 68.
Tuesday Night
Mostly cloudy, with a low around 53.
Wednesday
Partly sunny, with a high near 69.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Old Saybrook Center CT
 41.29°N 72.36°W (Elev. 3 ft)
Last Update:
3:19 pm EDT Sep 16, 2026
Forecast Valid:
7pm EDT Sep 16, 2026-6pm EDT Sep 23, 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