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Coldest sea in Japan in May

373 coastal locations in Japan ranked by typical May sea temperature, coldest first. Region-wide average in May: 17.4°C.

Coldest in May

Moyoro Wan

2.8°C May mean in Japan

Regional May average

17.4°C

across all 373 coastal locations in Japan

Vs annual mean

-1.7°C

below the year-round regional average

What the Japan sea feels like in May

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.

Japan monthly average 12.8°C to 26.6°C
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  • Warmest month August 26.6°C
  • Coldest month February 12.8°C
  • Annual mean 19.1°C
  • Months above 20°C 5 of 12

Where May fits in the year

May sits inside the regional pattern shown on the left. Pick a different month to see how the ranking shifts.

All twelve Japan month rankings:

Japan sea temperature map (live)

The map shows today's latest reading at every Japan location. The list below is based on the typical May mean.

Zoom in to see individual locations. Click a pin for water temperatures. View list →
°C -2 0 1 3 5 7 9 11 13 15 17 19 21 24 27 30 35

Top 50 coldest Japan locations in May

Sorted by typical May mean from a decade of daily readings, coldest first. Click any place for the full location page.

# Location May mean
1 Moyoro Wan Hokkaido 2.8°C
2 Shibetoro Hokkaido 2.8°C
3 Shana Wan Hokkaido 3.2°C
4 Hitokappi Wan Hokkaido 3.5°C
5 Naibo Wan Hokkaido 3.6°C
6 Furukamappu Wan Hokkaido 5.2°C
7 Kiritappu Hokkaido 6.0°C
8 Koiseboi Hokkaido 6.0°C
9 Hanasaki Hokkaido 6.2°C
10 Nemuro Ko Hokkaido 6.2°C
11 Akkeshi Hokkaido 6.3°C
12 Rubeshibetsu Hokkaido 6.3°C
13 Mombetsu 6.5°C
14 Hokkaido 6.6°C
15 Abashiri Ko Hokkaido 6.6°C
16 Kushiro 6.7°C
17 Tomari Wan Hokkaido 6.9°C
18 Hojo 7.0°C
19 Shizunai 7.0°C
20 Monbetsu Hokkaido 7.2°C
21 Erimo Misaki Hokkaido 7.4°C
22 Shibetsu 7.5°C
23 Soya Misaki Hokkaido 7.5°C
24 Omu Ko Hokkaido 7.6°C
25 Esashi (Hokkaido Ne Coast) Hokkaido 7.7°C
Show 25 more ▸
26 Urakawa Hokkaido 7.9°C
27 Wakkanai 8.4°C
28 Tomakomai 8.8°C
29 Oshidomari Wan Hokkaido 9.2°C
30 Noboribetsu 9.3°C
31 Usujiri Hokkaido 9.4°C
32 Muroran Hokkaidō 9.6°C
33 Usu Wan Hokkaido 9.6°C
34 Hakodate 9.6°C
35 Mori Ko Hokkaido 9.6°C
36 Sakai 9.9°C
37 Tomamae Hokkaido 10.6°C
38 Shiriya Aomori 10.9°C
39 Tomari Aomori 10.9°C
40 Rumoi Hokkaido 11.0°C
41 Kamui Misaki Hokkaido 11.0°C
42 Otaru 11.1°C
43 Yoichi 11.1°C
44 Hachinohe 11.3°C
45 Oma Aomori 11.3°C
46 Shiokubi Misaki Hokkaido 11.3°C
47 Ishikari 11.3°C
48 Sapporo 11.3°C
49 Ohata Aomori 11.4°C
50 Kuji Iwate 11.4°C

Warmest 10 in Japan in May

Same data the other way. The warmest spots for the same month.

# Location May mean
1 Yonakuni Shima Okinawa 27.4°C
2 Yonakuni 27.3°C
3 Minami-Tori Shima Tokyo 27.0°C
4 Funauke Okinawa 26.9°C
5 Kobi Sho Okinawa 26.9°C
6 Ishigaki 26.8°C
7 lo Shima Tokyo 26.7°C
8 Hirara Okinawa 26.3°C
9 Miyakojima 26.3°C
10 Fuji 25.9°C

More on this region