Long Island Sound water temperature in September

Is Long Island Sound too cold to swim in autumn? In September sea water temperature throughout Long Island Sound warms above 20°C and it is enough for a comfortable bath. Based on average water temperature observations over the past ten years, the warmest sea in Long Island Sound in September was 22.1°C (in Short Beach), and the coldest water 21°C (in Noyack). To find out the sea temperature today and in the coming days, go to Current sea temperature in Long Island Sound

Long Island Sound sea surface temp in September

Long Island Sound cities and resorts with the values of the average water temperature in September in recent years.
For more detailed information about water temperature, surf forecast, weather and time of sunrise and sunset in any specific area of your interest, just click on a city name. For ease of search, all places are also grouped by the first letter of the name.

To find out what the water temperature was in Long Island Sound any day over a period of the last ten years, select the month

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Our report for is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.