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Omu Ko Sea Temperature in October

Hokkaido, Japan

September Omu Ko year-round → November

Average sea temperature for Omu Ko, Japan across October, based on 10 years of daily readings.

Average

15.32° C

High

19.61° C

Low

9.66° C

At this temperature, water will feel cold compared to a swimming pool, but with a bit of experience and practice most people will find the water relatively comfortable to swim in.

October is the 4th warmest of 12 months at Omu Ko. On average the water sits 6.3° than the year-round mean of 9° C.

Compared to September, October is 4.1° cooler than (19.41° C in September). By November the water is usually 9.43° C.

Omu Ko Day-by-Day Water Temperature in October

10-year low, average and high

8.0° C
11.4° C
14.8° C
18.1° C
21.5° 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 Omu Ko.

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 Omu Ko

10-year daily averages

Day Average Low High
October 1 18.15° C 16° C 19.61° C
October 2 18.14° C 15.69° C 19.49° C
October 3 18° C 15.54° C 19.31° C
October 4 17.73° C 15.46° C 19.37° C
October 5 17.5° C 14.81° C 19.26° C
October 6 17.27° C 14.56° C 19.17° C
October 7 17.21° C 14.83° C 19.11° C
October 8 16.92° C 14.42° C 19.17° C
October 9 16.92° C 14.56° C 19.09° C
October 10 16.8° C 15.45° C 19.11° C
October 11 16.56° C 15.21° C 19.33° C
October 12 16.31° C 14.68° C 19.1° C
October 13 16.14° C 14.49° C 19.1° C
October 14 15.92° C 14.56° C 18.84° C
October 15 15.71° C 14.55° C 18.27° C
October 16 15.39° C 14.29° C 16.95° C
October 17 15.25° C 14.17° C 17.08° C
October 18 15.28° C 13.2° C 17.03° C
October 19 15.02° C 12.72° C 16.48° C
October 20 14.49° C 12.55° C 16.2° C
October 21 14.17° C 12.3° C 15.53° C
October 22 13.7° C 11.4° C 16.01° C
October 23 13.51° C 10.42° C 16.12° C
October 24 13.23° C 10.13° C 15.66° C
October 25 12.94° C 10.16° C 15.91° C
October 26 12.69° C 10.28° C 16.06° C
October 27 12.67° C 10.2° C 15.94° C
October 28 12.69° C 9.92° C 15.62° C
October 29 12.98° C 9.66° C 15.16° C
October 30 12.79° C 9.75° C 15.14° C
October 31 12.93° C 9.74° C 15.18° C

Where October Sits in the Year

October highlighted

-5.0° C
3.3° C
11.5° C
19.8° C
28.0° C
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
0.05° C
-1.03° C
0.82° C
4.63° C
7.71° C
11.51° C
16.35° C
19.45° C
19.41° C
15.32° C
9.43° C
4.29° C
10-year monthly history for Omu Ko. 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 Japan water for the same month

Omu Ko Location

44.5833, 142.9670

44.58330, 142.96699 View on OpenStreetMap →

Omu Ko sits at 44.5833°N, 142.9670°E, on the coast of Hokkaido, Japan. 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 Omu Ko