The highest day temperature in September 2025 was 82°F. The lowest night temperature was 56°F. The average values for day and night temperatures during September were 73.6°F и 66.8°F respectivly.

The average sea surface temperature in September 2025 for Hampton Bays was 72.3°F. The maximum and minimum values were 70.6°F and 75.2°F respectively.

Most of the days in September are sunny but you can also expect cloudy and gloomy days.

Precipitation total in September for Hampton Bays is 0.9 in. It makes september one of the least rainy months of the year.

The average wind speed in September is 12.7 mph. It makes September one of the most windless months of the year for Hampton Bays.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Hampton Bays in September is 7.7 hours.