cookislands.travel · Official Tourism
Cook Islands diving overview with visibility and access context.
Dive Spot Guide•
Blackrock
Blackrock is a sheltered west-coast reef with plateaus and caverns.
Best for shore access on calm days, with swim-throughs, shallow caverns, and enough structure to reward slow, buoyancy-checked exploration.
About Blackrock
Blackrock sits right in front of the Black Rock landmark on Rarotonga's northwest coast, with reef plateaus, healthy coral bommies, swim-throughs, and shallow caverns. It suits relaxed shore dives and calm-day snorkel sessions, with crayfish and lionfish often in the structure and enough relief to reward slow, careful exploration.
•
Research Estimate At Blackrock
Conservative baseline from public research. No community dives logged yet.
AccessEasy entry
CoralHealthy coral
Aquatic LifeGreat variety
FacilitiesBasic facilities
Crowd / PopularityFew visitors
Where Is Blackrock?
This spotNearby spotsExplore nearby spots on the map
Community sourced coordinates.
Blackrock Planning Details
Depth range, seasonality, and planning context.
Reported Depth
12m - 28m
Depth Note
The main route spans about 12 to 28 m, with the most interesting structure spread across the middle of that range.
Best Season
Year-round
Typical Conditions
Sheltered northwest-coast reef with clear water, reef plateaus, swim-throughs, and shallow caverns; calm seas make the site much more enjoyable.
Safety & Access At Blackrock
Hazards, restrictions, and access requirements.
Key Hazards
Overhead environment
Safety Notes
Stay within your training in the swim-throughs and shallow caverns, and keep conservative spacing when the sea is up.
Access Restrictions
The shallow caverns and swim-throughs are only for calm-sea conditions and divers comfortable with buoyancy control.
Legal Notes
Respect the culturally significant Tuoro and Black Rock coastal area, follow local beach rules, and do not disturb the rock formations or marine life.
Local Intel For Blackrock
Community notes to help plan your visit.
Scuba Diving
A reef-plateau dive with swim-throughs and shallow caverns that rewards deliberate buoyancy and calm-sea timing.
Freediving
Not a primary freedive target; if you freedive here, stay in the open reef and leave the caverns and swim-throughs for scuba.
Snorkeling
Blackrock is one of Rarotonga's better shore snorkel spots on calm days, with sheltered water and reef structure close to the beach.
Wildlife at Blackrock
Species commonly reported at this site, with direct links into their wildlife guides.
Recent Logged Visits At Blackrock
Community dive logs and visit reports for this site.
Dive Spot Log Averages At Blackrock
Average conditions based on logged dives & visits.
No community dive data has been logged here yet. Be the first to record a dive and seed the averages.
