Current conditions at
Groton / New London, Groton / New London Airport (KGON)
Lat: 41.33°NLon: 72.05°WElev: 10ft.
Light Rain Fog/Mist
69°F
21°C
| Humidity | 96% |
| Wind Speed | E 7 mph |
| Barometer | 29.63 in (1003.4 mb) |
| Dewpoint | 68°F (20°C) |
| Visibility | 6.00 mi |
| Last update | 29 Jul 7:56 pm EDT |
Extended Forecast for
Old Lyme CT
Tonight
Low: 64 °F
Chance
T-storms then
Chance
ShowersThursday

High: 74 °F
Showers
LikelyThursday Night
Low: 61 °F
Chance
Showers then
Partly CloudyFriday

High: 81 °F
Sunny
Friday Night

Low: 65 °F
Partly Cloudy
Saturday

High: 82 °F
Partly Sunny
Saturday Night

Low: 67 °F
Mostly Cloudy
Sunday

High: 81 °F
Partly Sunny
Sunday Night

Low: 66 °F
Chance
Showers
Detailed Forecast
Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Light north wind. Chance of precipitation is 40%.
Thursday
A chance of showers before 11am, then showers likely and possibly a thunderstorm between 11am and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 74. North wind 6 to 9 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 61. Light north wind.
Friday
Sunny, with a high near 81. Calm wind becoming west around 5 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 65. Calm wind.
Saturday
Partly sunny, with a high near 82.
Saturday Night
Mostly cloudy, with a low around 67.
Sunday
Partly sunny, with a high near 81.
Sunday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 66.
Monday
A 40 percent chance of showers. Partly sunny, with a high near 82.
Monday Night
Partly cloudy, with a low around 64.
Tuesday
Sunny, with a high near 83.
Tuesday Night
Mostly clear, with a low around 64.
Wednesday
Sunny, with a high near 85.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Old Lyme CT
41.31°N 72.33°W (Elev. 43 ft)
41.31°N 72.33°W (Elev. 43 ft)
3:44 pm EDT Jul 29, 2026
8pm EDT Jul 29, 2026-6pm EDT Aug 5, 2026


