Skip to content
seatemperatures.net

Sumner Sea Temperature in May

New Zealand

April Sumner year-round → June

Average sea temperature for Sumner, New Zealand across May, based on 10 years of daily readings.

Average

13.42° C

High

15.78° C

Low

11.09° 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 7th warmest of 12 months at Sumner. On average the water sits 0.3° than the year-round mean of 13.75° C.

Compared to April, May is 1.6° cooler than (15.02° C in April). By June the water is usually 11.38° C.

Sumner Day-by-Day Water Temperature in May

10-year low, average and high

10.0° C
11.6° C
13.3° C
14.9° C
16.5° 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 Sumner.

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 Sumner

10-year daily averages

Day Average Low High
May 1 14.22° C 13.28° C 15.22° C
May 2 14.26° C 13.32° C 15.2° C
May 3 14.21° C 13.29° C 15.17° C
May 4 14.09° C 13.15° C 15.12° C
May 5 14.03° C 13.12° C 15.22° C
May 6 13.98° C 13° C 15.35° C
May 7 14.06° C 12.96° C 15.78° C
May 8 14.06° C 12.87° C 15.48° C
May 9 13.96° C 12.75° C 15.19° C
May 10 13.97° C 12.8° C 14.98° C
May 11 13.86° C 12.71° C 14.86° C
May 12 13.75° C 12.77° C 14.6° C
May 13 13.62° C 12.63° C 14.52° C
May 14 13.51° C 12.62° C 14.66° C
May 15 13.41° C 12.61° C 14.24° C
May 16 13.37° C 12.58° C 14.04° C
May 17 13.35° C 12.52° C 14.08° C
May 18 13.26° C 12.31° C 14.17° C
May 19 13.23° C 12.15° C 14.16° C
May 20 13.12° C 12.08° C 13.93° C
May 21 13.05° C 12.09° C 13.77° C
May 22 12.87° C 11.89° C 13.61° C
May 23 12.8° C 11.83° C 13.51° C
May 24 12.81° C 11.94° C 13.46° C
May 25 12.81° C 11.92° C 13.71° C
May 26 12.85° C 11.78° C 14.25° C
May 27 12.76° C 11.61° C 13.93° C
May 28 12.63° C 11.41° C 13.65° C
May 29 12.52° C 11.33° C 13.69° C
May 30 12.48° C 11.28° C 13.63° C
May 31 12.44° C 11.09° C 13.53° C

Where May Sits in the Year

May highlighted

6.0° C
10.1° C
14.3° C
18.4° C
22.5° C
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
17.36° C
17.64° C
16.85° C
15.02° C
13.42° C
11.38° C
10.1° C
9.6° C
10.47° C
12.24° C
14.56° C
16.3° C
10-year monthly history for Sumner. 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 New Zealand water for the same month

Sumner Location

-43.5820, 172.7565

-43.58196, 172.75651 View on OpenStreetMap →

Sumner sits at -43.5820°N, 172.7565°E, on the coast of New Zealand. 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 Sumner