Skip to content
seatemperatures.net

Warmest sea in Japan in October

373 coastal locations in Japan ranked by their typical October sea temperature. Region-wide average in October: 23.0°C. The top of the list is where to find the warmest swimming this month.

Warmest in October

Minami-Tori Shima

29.0°C October mean in Japan

Regional October average

23.0°C

across all 373 coastal locations in Japan

Vs annual mean

+3.9°C

above the year-round regional average

What the Japan sea feels like in October

Water at this temperature is very pleasant to swim in. If you tend to wear a wetsuit when swimming, you might consider removing it now to avoid the body overheating.

Japan monthly average 12.8°C to 26.6°C
J
F
M
A
M
J
J
A
S
O
N
D
  • 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 October fits in the year

October 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 October mean, useful for trip planning weeks or months ahead.

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 warmest Japan locations in October

Sorted by the typical October mean built from a decade of daily readings at each location. Click any place for its 30-day chart, monthly profile, and full 10-year history.

# Location October mean
1 Minami-Tori Shima Tokyo 29.0°C
2 lo Shima Tokyo 28.7°C
3 Minami-Daito Shima Okinawa 28.4°C
4 Hirara Okinawa 28.2°C
5 Funauke Okinawa 28.1°C
6 Haha Shima Tokyo 28.1°C
7 Tsuhako Okinawa 28.1°C
8 Yonakuni Shima Okinawa 28.1°C
9 Yonakuni 28.0°C
10 Wadomari Kagoshima 28.0°C
11 Ishigaki 28.0°C
12 Naha Ko Okinawa 28.0°C
13 Miyakojima 27.9°C
14 Chichi Shima Tokyo 27.9°C
15 Suku Okinawa 27.9°C
16 Kerama Kaikyo (Zamami) Okinawa 27.9°C
17 Ogasawara 27.9°C
18 Sanmura Wan Kagoshima 27.8°C
19 Kanegusuku Okinawa 27.8°C
20 Kobi Sho Okinawa 27.8°C
21 Toguchi Okinawa 27.8°C
22 Koniya Kagoshima 27.7°C
23 Gakiya Okinawa 27.7°C
24 Haebaru 27.7°C
25 Itoman 27.7°C
Show 25 more ▸
26 Okinawa 27.7°C
27 Tomigusuku 27.7°C
28 Amami 27.6°C
29 Nakano Shima Kagoshima 27.6°C
30 Chatan 27.6°C
31 Gushikawa 27.6°C
32 Kasari Wan Kagoshima 27.6°C
33 Nago 27.6°C
34 Uken Kagoshima 27.5°C
35 Takara Shima Kagoshima 27.5°C
36 Kuchi-No-Erabu Shima Kagoshima 27.3°C
37 Isso Kagoshima 27.1°C
38 Kumano Kagoshima 27.1°C
39 Tori Shima Tokyo 27.1°C
40 Yakushima 26.8°C
41 Nishinoomote 26.6°C
42 Hachijo Jima Tokyo 26.5°C
43 Aburatsu Miyazaki 26.5°C
44 Makurazaki 26.5°C
45 Odomari Kagoshima 26.5°C
46 Yamagawa Kagoshima 26.5°C
47 Shibushi 26.4°C
48 Tarumizu 26.3°C
49 Kagoshima Kagoshima 26.3°C
50 Kiire Kagoshima 26.3°C

Coldest 10 in Japan in October

Same data the other way. Helpful if you want to know which Japan coasts to avoid for swimming in October.

# Location October mean
1 Moyoro Wan Hokkaido 11.6°C
2 Hitokappi Wan Hokkaido 12.4°C
3 Shibetoro Hokkaido 12.5°C
4 Shana Wan Hokkaido 12.9°C
5 Naibo Wan Hokkaido 13.1°C
6 Mombetsu 13.4°C
7 Hojo 14.1°C
8 Abashiri Ko Hokkaido 14.2°C
9 Koiseboi Hokkaido 14.2°C
10 Mikuni 14.4°C

More on this region