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Joetsu Sea Temperature in May

Japan

April Joetsu year-round → June

Average sea temperature for Joetsu, Japan across May, based on 10 years of daily readings.

Average

15.55° C

High

20.37° C

Low

11.73° 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.

May is the 8th warmest of 12 months at Joetsu. On average the water sits 2.7° than the year-round mean of 18.26° C.

Compared to April, May is 3.5° warmer than (12.01° C in April). By June the water is usually 20.28° C.

Joetsu Day-by-Day Water Temperature in May

10-year low, average and high

10.0° C
13.0° C
16.0° C
19.0° C
22.0° 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 Joetsu.

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 Joetsu

10-year daily averages

Day Average Low High
May 1 13.21° C 11.95° C 15.23° C
May 2 13.33° C 11.79° C 14.32° C
May 3 13.67° C 11.73° C 14.81° C
May 4 13.81° C 12.01° C 15.44° C
May 5 13.97° C 13.05° C 15.62° C
May 6 14.12° C 13.14° C 15.63° C
May 7 14.16° C 12.67° C 15.75° C
May 8 14.13° C 13.1° C 15.45° C
May 9 14.06° C 13.11° C 15.54° C
May 10 14.2° C 13.2° C 15.72° C
May 11 14.43° C 13.37° C 15.91° C
May 12 14.66° C 13.36° C 15.86° C
May 13 14.93° C 13.47° C 16.19° C
May 14 15.28° C 14.33° C 16.56° C
May 15 15.6° C 14.71° C 16.56° C
May 16 15.9° C 14.74° C 17.08° C
May 17 15.96° C 14.67° C 17.35° C
May 18 16.17° C 14.71° C 17.8° C
May 19 16.28° C 15.09° C 17.84° C
May 20 16.32° C 15.1° C 17.9° C
May 21 16.53° C 15.2° C 17.96° C
May 22 16.84° C 15.36° C 18.46° C
May 23 16.96° C 15.24° C 18.82° C
May 24 17.01° C 15.31° C 18.91° C
May 25 17.16° C 15.33° C 19.35° C
May 26 17.24° C 15.36° C 20.28° C
May 27 17.35° C 15.39° C 20.37° C
May 28 17.42° C 15.45° C 19.24° C
May 29 17.59° C 15.9° C 19.25° C
May 30 17.79° C 16.03° C 19.4° C
May 31 17.93° C 16.17° C 19° C

Where May Sits in the Year

May highlighted

7.0° C
13.4° C
19.8° C
26.1° C
32.5° C
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
13.07° C
11.29° C
10.63° C
12.01° C
15.55° C
20.28° C
24.97° C
27.67° C
26.2° C
22.65° C
18.87° C
15.88° C
10-year monthly history for Joetsu. 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 Japan water for the same month

Joetsu Location

37.1479, 138.2361

37.14790, 138.23613 View on OpenStreetMap →

Joetsu sits at 37.1479°N, 138.2361°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 Joetsu