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Oshika Sea Temperature in December

Nagasaki, Japan

November Oshika year-round → January

Average sea temperature for Oshika, Japan across December, based on 10 years of daily readings.

Average

18.38° C

High

20.37° C

Low

16.37° 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.

December is the 7th warmest of 12 months at Oshika. On average the water sits 2.0° than the year-round mean of 20.39° C.

Compared to November, December is 2.8° cooler than (21.15° C in November). By January the water is usually 16.02° C.

Oshika Day-by-Day Water Temperature in December

10-year low, average and high

15.5° C
16.9° C
18.3° C
19.6° 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 December. Range Average

Each vertical bar above is one day of December. 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 Oshika.

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.

December Water Temperature Table for Oshika

10-year daily averages

Day Average Low High
December 1 19.67° C 18.69° C 20.37° C
December 2 19.54° C 18.53° C 20.27° C
December 3 19.45° C 18.58° C 20.12° C
December 4 19.39° C 18.7° C 19.93° C
December 5 19.31° C 18.6° C 19.99° C
December 6 19.2° C 18.49° C 19.91° C
December 7 19.06° C 18.35° C 19.81° C
December 8 18.95° C 17.91° C 19.74° C
December 9 18.97° C 17.93° C 19.74° C
December 10 18.97° C 17.81° C 19.73° C
December 11 18.96° C 17.82° C 19.56° C
December 12 18.84° C 17.72° C 19.46° C
December 13 18.73° C 17.35° C 19.53° C
December 14 18.63° C 17.28° C 19.34° C
December 15 18.54° C 17.19° C 19.17° C
December 16 18.52° C 17.12° C 19.11° C
December 17 18.51° C 17.41° C 19.14° C
December 18 18.35° C 17.41° C 19.22° C
December 19 18.09° C 17.17° C 19.31° C
December 20 17.94° C 16.96° C 19.37° C
December 21 17.87° C 16.98° C 19.35° C
December 22 17.79° C 16.9° C 19.22° C
December 23 17.68° C 16.77° C 19.16° C
December 24 17.55° C 16.54° C 18.95° C
December 25 17.49° C 16.48° C 18.93° C
December 26 17.38° C 16.48° C 18.7° C
December 27 17.38° C 16.44° C 18.51° C
December 28 17.32° C 16.4° C 18.46° C
December 29 17.25° C 16.37° C 18.41° C
December 30 17.28° C 16.39° C 18.33° C
December 31 17.11° C 16.39° C 18.05° C

Where December Sits in the Year

December highlighted

10.5° C
16.1° C
21.8° C
27.4° C
33.0° C
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
16.02° C
14.91° C
15.14° C
16.42° C
18.14° C
21.43° C
24.71° C
27.73° C
26.65° C
23.98° C
21.15° C
18.38° C
10-year monthly history for Oshika. 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 December

Compare other Japan water for the same month

Oshika Location

34.5167, 129.4500

34.51670, 129.45000 View on OpenStreetMap →

Oshika sits at 34.5167°N, 129.4500°E, on the coast of Nagasaki, 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 Oshika