September weather forecastSetauket- East Setauket, NY
September
Weather in September
Ocean temperature
In Setauket- East Setauket, New York, in September, the average water temperature is 69.6°F (20.9°C).Note: Swimming in water with a temperature of 69.6°F (20.9°C) is not a pleasurable experience for the majority. As the temperature falls below 69.8°F (21°C), it becomes increasingly hard to control one's breathing.
Daylight
In Setauket- East Setauket, the average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:19 am and sunset at 7:24 pm. On the last day of September, sunrise is at 6:48 am and sunset at 6:35 pm EDT.
Updated: Jul 5, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
In Setauket- East Setauket, the average seawater temperature in September is 69.6°F (20.9°C). For swimming, a surface water temperature of 69.6°F (20.9°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).
In Setauket- East Setauket, the average day length in September is 12h and 27min.
On the first day of September, sunrise is at 6:19 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 6:35 pm EDT.
Average sea temperature in September
Setauket- East Setauket, NY
- Average sea temperature in September: 69.6°F
The best month for swimming (with the highest average sea temperature) is August (74°F).
The coldest month (with the lowest average sea temperature) is February (39.7°F).
Average daylight in September
Setauket- East Setauket, NY
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
