With warm, gin-clear seas, vast coral reefs and abundant marine life, Okinawa is one of Asia’s great diving and snorkelling destinations. From the dazzling “Kerama Blue” reefs and the glowing Blue Cave off Cape Maeda, to manta cleaning stations and the mysterious Yonaguni Monument, there’s something for every level — including easy trial (“experience”) dives for total beginners and snorkelling trips for non-divers. Operators across the island make it simple to get in the water.
This guide covers top spots, licensed vs trial dives, the best season, what to bring and how to book.
🗓️ Quick Reference
| Top spots | Kerama, Blue Cave, Yonaguni, Miyako |
| Levels | Trial dives, certified dives, snorkelling |
| Season | Year-round; best ~April–November |
| Price | Trial dive ~¥10,000–15,000 |
| Good for | Coral, fish, caves, manta, turtles |
Top spots
- Kerama Islands: world-class visibility, coral and turtles, a short ferry from Naha — see our Kerama guide .
- Blue Cave (Cape Maeda, Onna): a sea cave glowing electric blue — the most popular snorkel/trial-dive spot.
- Miyako Islands: dramatic arches, caves and channels — see our Miyako guide .
- Yonaguni: the enigmatic underwater “monument” and winter hammerhead sharks (advanced).
Trial vs certified dives & snorkelling
- Trial (“experience”) dives need no licence — an instructor guides you one-on-one; great for first-timers.
- Certified divers can join fun dives and boat trips to deeper sites.
- Snorkelling tours (e.g. Blue Cave, Kerama) suit non-divers and families.
- Many operators offer English support; confirm when booking.
Best season, what to bring & booking
- Year-round diving, with the calmest, warmest conditions roughly April–November.
- Bring swimwear, a towel and reef-safe sunscreen; operators provide gear.
- Book ahead in summer; conditions can cancel boats in rough weather.
- Note no-fly time after diving before departure flights.
Combine your visit
Pair underwater days with island time:
- Base in Naha and day-trip to the Kerama Islands — see our Kerama guide .
- Combine Blue Cave with west-coast beaches — see our beaches guide .
- See sea turtles up close — see our sea turtle snorkelling guide .
How to get there
- Operators are based all over (Naha, Onna/Cape Maeda, the islands); most include transport or meet on site.
- For the islands, factor in ferries or flights — see the linked island guides.
