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.

Overcast

74°F

23°C

Humidity 94%
Wind Speed SW 5 mph
Barometer 29.99 in (1015.7 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 8 Aug 3:56 am EDT
Extended Forecast for

Old Saybrook Center CT

Heat Advisory August 8, 04:08am until August 8, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 8, 04:08am until August 8, 08:00pm

    NOW until 8:00pm Sat

    Heat Advisory

  • Today

    High: 81 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 11pm. Partly cloudy, with a low around 72. Southwest wind 3 to 7 mph. Chance of precipitation is 20%.

    Low: 72 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 82. West wind 5 to 9 mph.

    High: 82 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 68. Light northwest wind.

    Low: 68 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 80. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 80 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 71.

    Low: 71 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers before 8pm, then a chance of showers after 2am. Partly cloudy, with a low around 68. Chance of precipitation is 30%.

    Low: 68 °F

    Chance
    Showers

Detailed Forecast

Today
Patchy fog between 10am and 11am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 81. Southwest wind 3 to 8 mph.
Tonight
A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 11pm. Partly cloudy, with a low around 72. Southwest wind 3 to 7 mph. Chance of precipitation is 20%.
Sunday
Mostly sunny, with a high near 82. West wind 5 to 9 mph.
Sunday Night
Mostly clear, with a low around 68. Light northwest wind.
Monday
Sunny, with a high near 80. Calm wind becoming southwest around 5 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 71.
Tuesday
A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 80.
Tuesday Night
A chance of showers before 8pm, then a chance of showers after 2am. Partly cloudy, with a low around 68. Chance of precipitation is 30%.
Wednesday
A 30 percent chance of showers before 8am. Partly sunny, with a high near 84.
Wednesday Night
A 30 percent chance of showers after 8pm. Mostly cloudy, with a low around 67.
Thursday
A 30 percent chance of showers. Mostly sunny, with a high near 84.
Thursday Night
A 30 percent chance of showers. Partly cloudy, with a low around 64.
Friday
Mostly sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Old Saybrook Center CT
 41.29°N 72.39°W (Elev. 89 ft)
Last Update:
2:28 am EDT Aug 8, 2026
Forecast Valid:
4am EDT Aug 8, 2026-6pm EDT Aug 14, 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