
Sea water temperature throughout Long Island Sound is not yet warm enough for swimming and does not exceed 20°C. The warmest sea temperature in Long Island Sound today is 16.9°C (in East Setauket), and the coldest water temperature is 15.2°C (Bronx).
Below are the cities and resorts in Long Island Sound with the values of water temperature today and yesterday. Also indicated are the maximum and minimum water temperatures that were recorded this month for the last ten years. Presented weather data are now available for each of the resorts. 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.