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Mystic Island Sea Temperature in May

New Jersey, United States

April Mystic Island year-round → June

Average sea temperature for Mystic Island, United States across May, based on 10 years of daily readings.

Average

13.92° C

High

19.15° C

Low

9.41° C

Water at this temperature is cold and will feel very cold initially, but the body will get used to it and longer swims are possible. Experienced swimmers can manage several hours of swimming, however hypothermia is still a real risk.

May is the 6th warmest of 12 months at Mystic Island. On average the water sits 0.3° than the year-round mean of 14.19° C.

Compared to April, May is 4.5° warmer than (9.41° C in April). By June the water is usually 19.64° C.

Mystic Island Day-by-Day Water Temperature in May

10-year low, average and high

7.5° C
10.9° C
14.3° C
17.6° C
21.0° C
1
5
10
15
20
25
31
Day-by-day low and high band with the 10-year daily average through May. Range Average

Each vertical bar above is one day of May. The shaded band covers the range the water has reached on that day across the last 10 years — the lowest reading at the bottom, the highest at the top. The line running through the bars is the daily average over those 10 years, so you can see the typical shape of the month at Mystic Island.

A narrow band means the temperature on that day has stayed close to the average year on year. A taller band means it has swung more, often because of changeable weather around that time of year. Hovering a day pulls up its low, average, and high.

May Water Temperature Table for Mystic Island

10-year daily averages

Day Average Low High
May 1 11.69° C 10.09° C 14° C
May 2 11.88° C 10.46° C 14.23° C
May 3 12.05° C 10.7° C 13.96° C
May 4 12.11° C 10.87° C 13.57° C
May 5 12.14° C 10.8° C 13.12° C
May 6 12.27° C 10.58° C 13.51° C
May 7 12.48° C 10.89° C 13.7° C
May 8 12.47° C 10.31° C 14.19° C
May 9 12.48° C 9.99° C 14.44° C
May 10 12.74° C 9.41° C 14.68° C
May 11 13.02° C 9.59° C 14.77° C
May 12 13.08° C 9.78° C 14.83° C
May 13 12.94° C 9.78° C 14.95° C
May 14 13.33° C 9.48° C 15.57° C
May 15 13.6° C 9.72° C 15.84° C
May 16 13.73° C 10.7° C 15.8° C
May 17 13.94° C 11.81° C 16.31° C
May 18 14.05° C 12.26° C 16.53° C
May 19 14.3° C 12.7° C 16.26° C
May 20 14.55° C 12.84° C 16.92° C
May 21 14.7° C 12.36° C 17.09° C
May 22 14.89° C 12.57° C 17.11° C
May 23 15.3° C 13.07° C 17.4° C
May 24 15.45° C 13.01° C 17.42° C
May 25 15.54° C 12.92° C 17.61° C
May 26 15.74° C 13.29° C 17.49° C
May 27 16.05° C 13.76° C 17.5° C
May 28 16.2° C 14.21° C 17.98° C
May 29 16.66° C 14.78° C 18.3° C
May 30 16.99° C 15.4° C 18.6° C
May 31 17.32° C 15.63° C 19.15° C

Where May Sits in the Year

May highlighted

-3.5° C
4.9° C
13.3° C
21.6° C
30.0° C
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
5.19° C
4.3° C
5.84° C
9.41° C
13.92° C
19.64° C
23.79° C
24.13° C
22.8° C
19.01° C
13.78° C
8.52° C
10-year monthly history for Mystic Island. Bars span historical low to high; the line marks the monthly average. Range Average
January → February → March → April → May → June → July → August → September → October → November → December →

Nearby Locations in May

Compare other United States water for the same month

Mystic Island Location

39.5685, -74.3881

39.56848, -74.38807 View on OpenStreetMap →

Mystic Island sits at 39.5685°N, 74.3881°W, on the coast of New Jersey, United States. The marker on the map shows the spot the readings on this page come from. It usually sits a short distance from the town centre, out on the open water itself, so the numbers stay tied to the coast rather than a generic point inland.

Coastlines bend, headlands focus the water, and the temperature can run noticeably differently between two beaches that look close together on a map. Comparing nearby locations is a quick way to see how local geography is shaping the readings.

Nearest locations to Mystic Island