Long Island water temperature in October

How cold is Long Island water in fall? In October sea water temperature throughout Long Island is not yet warm enough for swimming and does not exceed 68°F. Based on average water temperature observations over the past ten years, the warmest sea in Long Island in October was 65.1°F (in East Setauket), and the coldest water 63°F (in Montauk). To find out the sea temperature today and in the coming days, go to Current sea temperature in Long Island

Long Island sea surface temp in October

Long Island cities and resorts with the values of the average water temperature in October 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 any day over a period of the last ten years, select the month

Places with the warmest average sea water temperature in Long Island in October. Also indicated are the maximum and minimum temperatures in October for these locations based on observations over the past 10 years

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Our report for United States 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.