Summer Heat In Multiple Spots

A large dome of high pressure is expected to deliver summer heat with humidity in multiple sections of the country to start off the week. Excessive heat warnings and heat advisories are in effect across the south-central Plains, Mid to Lower Mississippi Valley and from the Mid-Atlantic into the Northeast. This includes the cities of New York, Philadelphia, Dallas, Oklahoma City and Kansas City. Read More >

Current conditions at

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

Lat: 41.33°NLon: 72.05°WElev: 10ft.

Mostly Cloudy

77°F

25°C

Humidity 88%
Wind Speed SW 5 mph
Barometer 30.00 in (1015.9 mb)
Dewpoint 73°F (23°C)
Visibility 9.00 mi
Heat Index78°F (26°C)
Last update 18 Aug 9:56 pm EDT
Extended Forecast for

South Lyme CT

Heat Advisory until August 19, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until August 19, 08:00pm

    NOW until
    8:00pm Mon

    Heat Advisory

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms before 2am.  Mostly cloudy, with a low around 72. Southwest wind around 6 mph.

    Chance
    T-storms

    Low: 72 °F

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 2pm.  Mostly sunny, with a high near 88. Heat index values as high as 97. Southwest wind 5 to 8 mph.

    Mostly Sunny
    then Slight
    Chance
    T-storms

    High: 88 °F

  • Monday
    Night

    Monday Night: A 40 percent chance of showers and thunderstorms, mainly before 11pm.  Mostly cloudy, with a low around 69. Southwest wind 5 to 7 mph becoming calm  in the evening.

    Chance
    T-storms

    Low: 69 °F

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms.  Mostly sunny, with a high near 87. Calm wind becoming south around 6 mph in the afternoon.

    Slight Chance
    T-storms

    High: 87 °F

  • Tuesday
    Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 69. South wind around 6 mph becoming calm  after midnight.

    Chance
    T-storms

    Low: 69 °F

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a high near 83.

    Chance
    T-storms

    High: 83 °F

  • Wednesday
    Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 71.

    Chance
    T-storms

    Low: 71 °F

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after noon.  Partly sunny, with a high near 82. Chance of precipitation is 40%.

    Chance
    Showers then
    Chance
    T-storms

    High: 82 °F

Detailed Forecast

Tonight
A 40 percent chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 72. Southwest wind around 6 mph.
Monday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. Heat index values as high as 97. Southwest wind 5 to 8 mph.
Monday Night
A 40 percent chance of showers and thunderstorms, mainly before 11pm. Mostly cloudy, with a low around 69. Southwest wind 5 to 7 mph becoming calm in the evening.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87. Calm wind becoming south around 6 mph in the afternoon.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69. South wind around 6 mph becoming calm after midnight.
Wednesday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 83.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.
Thursday
A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 82. Chance of precipitation is 40%.
Thursday Night
Partly cloudy, with a low around 63.
Friday
Mostly sunny, with a high near 78.
Friday Night
Mostly clear, with a low around 61.
Saturday
Sunny, with a high near 75.
Saturday Night
Mostly clear, with a low around 62.
Sunday
Sunny, with a high near 77.
Click Map For Forecast
Point Forecast:
South Lyme CT
 41.33°N 72.32°W (Elev. 56 ft)
9:47 pm EDT Aug 18, 2019
10pm EDT Aug 18, 2019-6pm EDT Aug 25, 2019
 
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Additional Resources

Radar & Satellite Image

Northeast Radar Mosaic Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database