National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Groton / New London, Groton / New London Airport (KGON)

Lat: 41.33°NLon: 72.05°WElev: 10ft.

Fair

23°C

73°F

Humidity 100%
Wind Speed SW 7 km/h
Barometer 1017.7 mb (30.06 in)
Dewpoint 23°C (73°F)
Visibility 16 km
Last update 15 Jul 9:56 pm EDT
Extended Forecast for

Old Saybrook Center CT

Heat Advisory July 16, 11:00am until July 17, 10:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 22. Calm wind.

    Low: 22 °C

    Patchy Fog

  • Wednesday

    Wednesday: Patchy fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 29. Calm wind becoming south 5 to 10 km/h in the afternoon.

    High: 29 °C

    Patchy Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms, mainly after 2am. Increasing clouds, with a low around 22. South wind 5 to 10 km/h.

    Low: 22 °C

    Slight Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 28. Southwest wind 8 to 16 km/h, with gusts as high as 32 km/h. Chance of precipitation is 60%. New rainfall amounts between 2.5 and 5 mm possible.

    High: 28 °C

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 8pm. Partly cloudy, with a low around 23. Southwest wind 8 to 10 km/h. Chance of precipitation is 60%.

    Low: 23 °C

    Showers
    Likely then
    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 30.

    High: 30 °C

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 18.

    Low: 18 °C

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 27.

    High: 27 °C

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 19.

    Low: 19 °C

    Partly Cloudy

Detailed Forecast

Tonight
Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 22. Calm wind.
Wednesday
Patchy fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 29. Calm wind becoming south 5 to 10 km/h in the afternoon.
Wednesday Night
A 40 percent chance of showers and thunderstorms, mainly after 2am. Increasing clouds, with a low around 22. South wind 5 to 10 km/h.
Thursday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 28. Southwest wind 8 to 16 km/h, with gusts as high as 32 km/h. Chance of precipitation is 60%. New rainfall amounts between 2.5 and 5 mm possible.
Thursday Night
Showers likely and possibly a thunderstorm before 8pm. Partly cloudy, with a low around 23. Southwest wind 8 to 10 km/h. Chance of precipitation is 60%.
Friday
Sunny, with a high near 30.
Friday Night
Mostly clear, with a low around 18.
Saturday
Sunny, with a high near 27.
Saturday Night
Partly cloudy, with a low around 19.
Sunday
A 40 percent chance of showers. Partly sunny, with a high near 27.
Sunday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 20.
Monday
Mostly sunny, with a high near 28.
Monday Night
Partly cloudy, with a low around 18.
Tuesday
Mostly sunny, with a high near 27.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Old Saybrook Center CT
 41.29°N 72.36°W (Elev. 3 m)
Last Update:
3:16 pm EDT Jul 15, 2025
Forecast Valid:
10pm EDT Jul 15, 2025-6pm EDT Jul 22, 2025
 
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