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Sumner Sea Temperature in October

New Zealand

September Sumner year-round → November

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

Average

12.24° C

High

14.99° C

Low

10.5° 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.

October is the 8th warmest of 12 months at Sumner. On average the water sits 1.5° than the year-round mean of 13.75° C.

Compared to September, October is 1.8° warmer than (10.47° C in September). By November the water is usually 14.56° C.

Sumner Day-by-Day Water Temperature in October

10-year low, average and high

9.5° C
11.1° C
12.8° C
14.4° C
16.0° C
1
5
10
15
20
25
31
Day-by-day low and high band with the 10-year daily average through October. Range Average

Each vertical bar above is one day of October. 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.

October Water Temperature Table for Sumner

10-year daily averages

Day Average Low High
October 1 11.21° C 10.9° C 11.73° C
October 2 11.25° C 10.76° C 11.95° C
October 3 11.29° C 10.65° C 12.07° C
October 4 11.31° C 10.74° C 11.84° C
October 5 11.39° C 10.74° C 12.19° C
October 6 11.5° C 10.55° C 12.41° C
October 7 11.51° C 10.5° C 12.43° C
October 8 11.72° C 10.76° C 12.47° C
October 9 11.77° C 10.83° C 12.32° C
October 10 11.76° C 11.11° C 12.28° C
October 11 11.77° C 11.15° C 12.38° C
October 12 11.8° C 11.11° C 12.43° C
October 13 11.81° C 11.19° C 12.42° C
October 14 11.77° C 11.18° C 12.44° C
October 15 11.89° C 11.53° C 12.55° C
October 16 12° C 11.61° C 12.46° C
October 17 12.15° C 11.73° C 12.6° C
October 18 12.35° C 11.98° C 12.65° C
October 19 12.55° C 12.17° C 13.14° C
October 20 12.67° C 12.1° C 13.47° C
October 21 12.74° C 12.06° C 13.71° C
October 22 12.86° C 12.01° C 14° C
October 23 13.02° C 11.61° C 14.21° C
October 24 13.09° C 11.32° C 14.26° C
October 25 13.03° C 11.31° C 13.98° C
October 26 13.06° C 12.16° C 13.69° C
October 27 13.13° C 12.73° C 13.81° C
October 28 13.14° C 12.5° C 13.79° C
October 29 13.21° C 12.34° C 14.57° C
October 30 13.31° C 12.19° C 14.99° C
October 31 13.33° C 12.4° C 14.96° C

Where October Sits in the Year

October 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 October

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