Long Island Sound Water Temperature

(Today) 2024

17.8°C / 64°F

The water will feel medium. The water will feel a bit chilly in just bathers / swimming costume. If you plan on wearing a wetsuit 4/3mm should be thick enough.

*Live data from New Haven, CT: 14.8°C / 58.6°F

Current weather

8°C / 46°F
(few clouds)
Partly cloudy
Wind
13 mph
Humidity
74%

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.

*Live data may vary from satellite readings for a number of reasons. These include local factors, depth of smapling and time of day.

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.

Long Island Sound average maximum / minimum water temperatures
Maximum and minimum monthly sea temperatures in Long Island Sound
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 2.3 2 2.7 3.7 7.6 13.9 19.1 20.9 19 14.3 11.1 6.9
Max °C 7.9 5.2 5.8 10.1 14.8 20.5 24.2 24.7 21.9 20.2 14.6 11.7
Min °F 38.4 36.9 38.1 41.2 48.6 59.7 68.4 71.1 67.3 60.1 53.3 46.3
Max °F 44 40.1 41.2 47.6 55.8 66.3 73.5 74.9 70.2 66 56.8 51.1

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

FriSatSunMonTueWedThu
  • Low 5:59am
    (-0.16m)
  • High 12:12pm
    (2.42m)
  • Low 6:39pm
    (-0.28m)
  • High 12:45am
    (2.11m)
  • Low 6:47am
    (-0.11m)
  • High 1:01pm
    (2.39m)
  • Low 7:30pm
    (-0.22m)
  • High 1:36am
    (2.04m)
  • Low 7:37am
    (-0.02m)
  • High 1:52pm
    (2.3m)
  • Low 8:23pm
    (-0.12m)
  • High 2:29am
    (1.95m)
  • Low 8:31am
    (0.09m)
  • High 2:45pm
    (2.16m)
  • Low 9:19pm
    (0.01m)
  • High 3:25am
    (1.86m)
  • Low 9:29am
    (0.2m)
  • High 3:44pm
    (2.02m)
  • Low 10:18pm
    (0.13m)
  • High 4:25am
    (1.78m)
  • Low 10:31am
    (0.29m)
  • High 4:46pm
    (1.9m)
  • Low 11:20pm
    (0.22m)
  • High 5:28am
    (1.74m)
  • Low 11:37am
    (0.35m)
  • High 5:51pm
    (1.82m)
7 day tide times 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.