Scuba diving in Japan
2 dive regions in Japan, each scored month by month for marine life, coral health, visibility, water temperature, currents and weather. Taken together, the diving here is at its best in December–April, but every region has its own season, so check the grid below before you book.
Also see: Indo-Pacific
Best time to dive in Japan, region by region
Sorted by each region's best month
| Nov2026 | Dec | Jan2027 | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| YonaguniJapan | 6.3 | 6.9 | 7.3 | 7.3 | 7.4 | 6.5 | 5.7 | 5.7 | 5.5 | 5.4 | 5.4 | 5.5 | 6.3 | 6.9 |
| Okinawa & Kerama IslandsJapan | 6.6 | 6.4 | 6.6 | 6.8 | 6.9 | 6.8 | 6.6 | 6.6 | 6.4 | 6.4 | 6.4 | 6.5 | 6.6 | 6.4 |
Overall score out of 10 with balanced priorities, from the current forecast.
Dive regions in Japan
- YonaguniIndo-Pacific
Peak season: December–March · Advanced · Day boat
Known for scalloped hammerhead, Yonaguni Monument
- Okinawa & Kerama IslandsIndo-Pacific
Peak season: year-round · Beginner · Day boat, Shore
Known for green turtle, humpback whale, nudibranchs