Mystic Island Water Temperature

(Today) 2025

3°C / 37.4°F

The water will feel freezing / baltic. You would have to be insane or getting paid to want to get in water this cold! If you do make sure you are wearing a top end drysuit and all the accessories.

Air temperature

°C - °C


The measurements for the water temperature in Mystic Island, New Jersey 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 Mystic Island water temperature derived from many years of historical sea surface temperature data.

Mystic Island average maximum / minimum water temperatures
Maximum and minimum monthly sea temperatures in Mystic Island
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 3 2.9 3.1 4.4 8.2 14.7 20.9 22 19.5 14.5 10.9 5.9
Max °C 8.3 6.4 6.9 11.7 16.5 23.1 25.3 26.6 24.1 21.4 15 11.8
Min °F 39.5 38.6 39.1 42.8 50 61.8 71.4 73.4 68.9 60.8 53.2 44.9
Max °F 44.8 42.1 42.9 50.1 58.3 70.2 75.8 78 73.5 67.7 57.3 50.8

The warmest water temperature is in August with an average around 75.7°F / 24.3°C. The coldest month is February with an average water temperature of 40.3°F / 4.6°C.