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.

Light Rain and Breezy

69°F

21°C

Humidity 96%
Wind Speed SE 21 G 33 mph
Barometer 29.55 in (1000.5 mb)
Dewpoint 68°F (20°C)
Visibility 8.00 mi
Last update 29 Jul 8:56 am EDT
Extended Forecast for

2 Miles NNW Old Saybrook Center CT

Flood Watch July 29, 09:54am until July 29, 02:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch July 29, 09:54am until July 29, 02:00pm

    NOW until 2:00pm Wed

    Flood Watch

  • Today

    High: 75 °F

    Showers then
    Showers
    Likely

  • Tonight

    Tonight: Showers likely and possibly a thunderstorm before 11pm, then a chance of showers. Mostly cloudy, with a low around 63. Light east wind. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 63 °F

    Showers
    Likely

  • Thursday

    Thursday: A chance of showers, then showers likely and possibly a thunderstorm after 11am. Mostly cloudy, with a high near 77. North wind 5 to 8 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 77 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before 2am. Mostly cloudy, with a low around 61. Light north wind.

    Low: 61 °F

    Slight Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 82. North wind 3 to 5 mph.

    High: 82 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 67.

    Low: 67 °F

    Mostly Cloudy

Detailed Forecast

Today
Showers and possibly a thunderstorm. High near 75. Southeast wind 11 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Tonight
Showers likely and possibly a thunderstorm before 11pm, then a chance of showers. Mostly cloudy, with a low around 63. Light east wind. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
A chance of showers, then showers likely and possibly a thunderstorm after 11am. Mostly cloudy, with a high near 77. North wind 5 to 8 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
A 20 percent chance of showers before 2am. Mostly cloudy, with a low around 61. Light north wind.
Friday
Mostly sunny, with a high near 82. North wind 3 to 5 mph.
Friday Night
Mostly clear, with a low around 64.
Saturday
Mostly sunny, with a high near 82.
Saturday Night
Mostly cloudy, with a low around 67.
Sunday
Partly sunny, with a high near 80.
Sunday Night
A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 67.
Monday
A 30 percent chance of showers. Partly sunny, with a high near 81.
Monday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 67.
Tuesday
Mostly sunny, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Old Saybrook Center CT
 41.31°N 72.38°W (Elev. 82 ft)
Last Update:
2:23 am EDT Jul 29, 2026
Forecast Valid:
9am EDT Jul 29, 2026-6pm EDT Aug 4, 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