Introductory Blue Cave diving page with boat entry and beginner guidance.
Popular Blue Cave site with easy access and bright reef life
Popular Blue Cave site with easy access and bright reef life
Most visitors book a guided boat or beach tour.
Pink Marlin Buoy is the Cape Maeda Blue Cave area in Onna, a shallow and very popular Okinawa site where the cave glow, nearby coral reef, and easy access make it a favorite for beginners. The dive works best as a guided, calm-water outing, with the main planning question being timing around crowding and the light inside the cave.
Conservative baseline from public research. No community dives logged yet.
Depth range, seasonality, and planning context.
Reported Depth
5m - 7m
Depth Note
The Blue Cave reaches about 6 m at its deepest point.
Best Season
Year-round.
Typical Conditions
Shallow sea cave with bright blue light, calm conditions, and heavy snorkeler traffic.
Site conditions, restrictions, and access requirements.
Site Conditions
Safety Notes
You can surface inside the cave, but keep to the guide and watch the entrance if swell changes.
Access Restrictions
Beach entry is standard, and the cave can be busy with snorkelers; conditions can close it down on rough days.
Legal Notes
Follow local tour rules and cave-entry procedures at Cape Maeda.
Community notes to help plan your visit.
Scuba Diving
A shallow, beginner-friendly cave dive with a strong blue-light payoff and easy reef viewing.
Freediving
Calm-water breath-hold exploration is possible near the entrance, but it is mainly used as a guided snorkel or scuba experience.
Snorkeling
One of Okinawa's most popular snorkel sites, with easy shallow-water viewing and a busy cave area.
Species commonly reported at this site, with direct links into their wildlife guides.
Community dive logs and visit reports for this site.
Average conditions based on logged dives & visits.
Planning answers for access, conditions, timing, and site logistics.
Last Updated
Research Sources
Introductory Blue Cave diving page with boat entry and beginner guidance.
Official Blue Cave page with novice-diver positioning and Onna access details.
Tour listing with practical facilities and beginner-oriented access.
Blue Cave overview with depth, fish, and beginner-friendly cave details.
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