Long Island Sound Water Temperature
The water will feel cold. All but the most ardent watersports enthusiasts will be thinking of packing up for the winter. If not we'd suggest a thick 5/4mm wetsuit along with some boots and a hood.
The measurements for the water temperature in Long Island Sound, New York are provided by the daily satellite readings provided by the NOAA. The temperatures given are the sea surface temperature (SST) which is most relevant to recreational users.
Water temp by month
Monthly average max / min water temperatures
The graph below shows the range of monthly Long Island Sound water temperature derived from many years of historical sea surface temperature data.
The warmest water temperature is in August with an average around 73°F / 22.8°C. The coldest month is February with an average water temperature of 38.5°F / 3.6°C.
7 day tide forecast for Long Island Sound
*These tide times are estimates based on the nearest accurate location (New Haven Harbor entrance, Connecticut) and may differ by up to half an hour depending on distance. Please note, the tide times given are not suitable for navigational purposes.