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Hiroshima Sea Temperature in January

Hiroshima, Japan

December Hiroshima year-round → February

Average sea temperature for Hiroshima, Japan across January, based on 10 years of daily readings.

Average

13.49° C

High

15.81° C

Low

10.87° 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.

January is the 10th warmest of 12 months at Hiroshima. On average the water sits 5.4° than the year-round mean of 18.91° C.

Compared to December, January is 3.6° cooler than (17.1° C in December). By February the water is usually 11.64° C.

Hiroshima Day-by-Day Water Temperature in January

10-year low, average and high

10.0° C
11.8° C
13.5° C
15.3° C
17.0° C
1
5
10
15
20
25
31
Day-by-day low and high band with the 10-year daily average through January. Range Average

Each vertical bar above is one day of January. 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 Hiroshima.

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.

January Water Temperature Table for Hiroshima

10-year daily averages

Day Average Low High
January 1 15.18° C 14.49° C 15.64° C
January 2 14.98° C 14.36° C 15.55° C
January 3 14.79° C 14.22° C 15.36° C
January 4 14.61° C 13.78° C 15.39° C
January 5 14.51° C 13.56° C 15.59° C
January 6 14.44° C 13.44° C 15.81° C
January 7 14.35° C 13.34° C 15.76° C
January 8 14.22° C 13.04° C 15.52° C
January 9 14.05° C 12.83° C 14.96° C
January 10 13.93° C 12.67° C 14.7° C
January 11 13.86° C 12.51° C 14.77° C
January 12 13.74° C 11.91° C 14.92° C
January 13 13.66° C 11.62° C 15.07° C
January 14 13.49° C 11.53° C 14.73° C
January 15 13.42° C 11.58° C 14.52° C
January 16 13.41° C 11.78° C 14.5° C
January 17 13.3° C 11.55° C 14.22° C
January 18 13.18° C 11.01° C 14.11° C
January 19 13.14° C 11.06° C 14.15° C
January 20 13.05° C 11.2° C 13.91° C
January 21 13.04° C 11.46° C 13.83° C
January 22 13° C 11.54° C 13.68° C
January 23 12.99° C 11.61° C 13.78° C
January 24 12.78° C 11.63° C 13.67° C
January 25 12.74° C 11.71° C 13.74° C
January 26 12.63° C 11.47° C 13.78° C
January 27 12.55° C 11.16° C 13.82° C
January 28 12.38° C 10.88° C 13.16° C
January 29 12.24° C 10.87° C 12.85° C
January 30 12.21° C 11.02° C 12.94° C
January 31 12.18° C 11.16° C 12.98° C

Where January Sits in the Year

January highlighted

7.5° C
13.5° C
19.5° C
25.5° C
31.5° C
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
13.49° C
11.64° C
11.69° C
13.95° C
16.68° C
20.28° C
24.33° C
26.78° C
26.38° C
23.84° C
20.76° C
17.1° C
10-year monthly history for Hiroshima. 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 January

Compare other Japan water for the same month

Hiroshima Location

34.3500, 132.4670

34.35000, 132.46699 View on OpenStreetMap →

Hiroshima sits at 34.3500°N, 132.4670°E, on the coast of 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 Hiroshima