The temperatures in Old Saybrook in September are comfortable with low of 15°C and and high up to 23°C.
You can expect about 3 to 8 days of rain in Old Saybrook during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Old Saybrook in September 2025.
If you’re planning to visit Old Saybrook in the near future, we highly recommend that you review the 14 day weather forecast for Old Saybrook before you arrive.
Temperatures
23° / 15°
Rainy Days
6
Snowy Days
0
Dry Days
24
Rainfall
105
mm
Sun Hours
7.3
Hrs
