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

71°F

22°C

Humidity 71%
Wind Speed NE 8 mph
Barometer 30.12 in (1019.8 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 31 Aug 8:56 am EDT
Extended Forecast for

Conning Towers-Nautilus Park CT

  • Today

    Today: Mostly sunny, with a high near 75. Light and variable wind becoming south 5 to 7 mph in the afternoon.

    High: 75 °F

    Mostly Sunny

  • Tonight

    Tonight: A slight chance of showers before 11pm, then a chance of showers and thunderstorms between 11pm and 2am, then showers and possibly a thunderstorm after 2am. Low around 66. Light south wind. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 66 °F

    Chance
    Showers then
    Showers

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm before 2pm, then a chance of showers. Steady temperature around 69. Southeast wind 5 to 8 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 69 °F

    Showers

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers before 2am. Mostly cloudy, with a low around 64. East wind 7 to 9 mph.

    Low: 64 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then showers likely after 5pm. Mostly cloudy, with a high near 71. East wind 7 to 9 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 71 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers, mainly after 2am. Steady temperature around 69. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 69 °F

    Showers

  • Thursday

    Thursday: Showers, with thunderstorms also possible after 2pm. High near 76. Chance of precipitation is 80%.

    High: 76 °F

    Showers

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 62. Chance of precipitation is 60%.

    Low: 62 °F

    Showers
    Likely then
    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 75. Light and variable wind becoming south 5 to 7 mph in the afternoon.
Tonight
A slight chance of showers before 11pm, then a chance of showers and thunderstorms between 11pm and 2am, then showers and possibly a thunderstorm after 2am. Low around 66. Light south wind. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
Showers and possibly a thunderstorm before 2pm, then a chance of showers. Steady temperature around 69. Southeast wind 5 to 8 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
A 50 percent chance of showers before 2am. Mostly cloudy, with a low around 64. East wind 7 to 9 mph.
Wednesday
A chance of showers before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then showers likely after 5pm. Mostly cloudy, with a high near 71. East wind 7 to 9 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers, mainly after 2am. Steady temperature around 69. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
Showers, with thunderstorms also possible after 2pm. High near 76. Chance of precipitation is 80%.
Thursday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 62. Chance of precipitation is 60%.
Friday
Mostly sunny, with a high near 78.
Friday Night
Partly cloudy, with a low around 59.
Saturday
Mostly sunny, with a high near 73.
Saturday Night
Partly cloudy, with a low around 56.
Sunday
Sunny, with a high near 73.
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ABOUT THIS FORECAST

 
Point Forecast:
Conning Towers-Nautilus Park CT
 41.36°N 72.08°W (Elev. 79 ft)
Last Update:
7:34 am EDT Aug 31, 2026
Forecast Valid:
9am EDT Aug 31, 2026-6pm EDT Sep 6, 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