Dive guide page with coral forest and spring cuttlefish note.
Boat dive on Nagannu North with coral slope and seasonal marine life.
Boat dive on Nagannu North with coral slope and seasonal marine life.
Nagannu North is a guided boat dive on the north side of Nagannu Island in the Chibishi Islands. The site pairs a coral slope with a steeper outer edge and is known for clear water, reef fish, turtles, sharks, rays, and seasonal cuttlefish. It suits divers who want an accessible Okinawa day-trip site with scenery and regular marine-life encounters.
Conservative baseline from public research. No community dives logged yet.
Depth range, seasonality, and planning context.
Reported Depth
15m - 40m
Depth Note
Operator listings put the dive range around 15-30 m, and site descriptions note a drop-off that can reach about 40 m.
Best Season
Spring through autumn, with the easiest boat operations in calmer weather.
Typical Conditions
Clear tropical water, a coral slope, and a steeper outer edge; conditions can range from relaxed reef cruising to drift-style diving.
Hazards, restrictions, and access requirements.
Key Hazards
Safety Notes
This is a drop-off site where larger sharks may be encountered; maintain appropriate distance and control buoyancy along the wall.
Access Restrictions
Boat access only; dive planning depends on wind and sea state, and local operators may switch sites.
Legal Notes
Follow local operator briefings and any marine-park or island access rules in force on the day.
Community notes to help plan your visit.
Scuba Diving
Best as a guided boat dive along the reef edge and drop-off, with room for coral scenery and passing pelagics.
Freediving
Not a primary freedive site; the profile and boat logistics make scuba the better fit.
Snorkeling
The shallow reef margin may be visible on calm days, but Nagannu North is mainly a scuba and drift-oriented site rather than a snorkel-first stop.
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
Dive guide page with coral forest and spring cuttlefish note.
Recent operator log with visibility and depth from Nagannu North.
Official island activities page for seasonal marine activities.
Official Okinawa diving guide for Chibishi access and boat timing.
Dive center page with Nagannu North listing, depth band, and wildlife.
Chibishi area guide with drift and current context.
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