Blue Cave
Japan / Okinawa / Onna
Okinawa's Blue Cave is known for its shallow blue-lit cavern entrance and easy access, making it popular for discovery dives and new OW divers. Weather and swell affect access, and peak season can be busy.
Recommended level
Beginner
Recommended dives
0+
Max depth
18 m
Average depth
8 m
Current
Calm
Visibility
8-25 m
Water temperature
22-29°C
Best months
Apr, May, Jun, Jul, Aug, Sep, Oct
Best for
Highlights
- • Beginner friendly
- • Blue-lit cavern entrance
- • Easy access
What this page helps you answer
If you are comparing Blue Cave by depth, current, visibility, diver level, and itinerary fit, this page gives a faster planning summary than a simple site name list.
Marine life
Dive types
Safety notes
- • Do not enter in rough swell
- • Keep spacing inside the cave
- • Watch boats and snorkelers in peak season
- • Entry type: Boat / shore.
- • Adjust depth and route based on local guide judgment.
Map and coordinates
Blue Cave
26.444, 127.774
Continue with related pages
Okinawa destination guide
Review Okinawa by season, diver level, and signature sites before deciding where Blue Cave fits in the trip.
Okinawa dive sites
Compare Blue Cave with other Okinawa dive sites by current, depth, and best months.
Beginner-friendly dive sites
If you still need an OW-friendlier shortlist, this topic page is a quicker starting point.
Nearby dive sites
Manta Scramble
Japan / Ishigaki / Yaeyama
- Max depth
- 18 m
- Best months
- Jun, Jul, Aug, Sep, Oct
- • Popular manta site in Japan
- • Friendly depth profile
FAQ
Is this dive site suitable for OW divers? +
Blue Cave is relatively suitable for OW divers, but conditions and guide decisions still matter.
What are the best months to dive here? +
The recommended months for Blue Cave are Apr, May, Jun, Jul, Aug, Sep, Oct. Confirm current local conditions before booking.
Is the current strong here? +
The current rating is Calm. Tide and operator judgment should guide the final decision.
What marine life can be seen? +
Common highlights include reef fish, coral, damselfish.