Meet the site
The offshore reefs off the West End of Rottnest are the deepest and wildest regular dive grounds around Perth. Marinelife.org.au describes depths of 18-30 m, among the deepest reef dives near the city, over flat sections broken by spires up to 10 m high and deep fissures. Fish life is described as prolific and interesting, with deeper-water species, large groupers, dhufish, schools of kingfish and mackerel, and the possibility of sharks and even a passing migrating whale. Visibility is sometimes very clear and typically 10-20 m.
The West End Demersal Sanctuary Zone covers this end of the island to protect bottom-dwelling species such as western rock lobster and dhufish, which is part of the reason fish are so abundant. Specific named sites in the area include Shark Cave, Tuna Hut, Cathedral Rocks and the 10 Metre Spire, which have their own entries.
These are serious dives: the swell is usually large, currents are strong, and the site is far from shelter and help. They suit Advanced divers with deep and drift experience diving from a well-crewed boat. On the right day they offer a sense of wilderness diving on Perth's doorstep that the sheltered north-east reefs cannot match.
Plan for a long day, carry spare gas and safety gear, and have a sheltered fall-back site in mind.
Research this site before booking Stored site notes may be historical. These questions highlight gaps without turning old instructions into a current dive plan.
West End Reefs is recorded as Reef in Rottnest Island. The listed access is boat (day trip). Confirm the actual meeting point, route and permission to visit; a map pin does not establish any of these.
Topics flagged by the stored research
These are questions prompted by the existing notes, not a verified or complete hazard assessment.
- Current and timing
- Ask how the operator assesses the current window for the actual route. Historical tide notes are not a departure instruction.
- Other water users
- Ask about vessel activity, exclusion areas and the agreed surface arrangements.
- Planned depth
- Confirm the intended route and training requirements; the recorded maximum is not a target.
- Water movement
- Ask how swell and local exposure affect the proposed entry, exit and route.
Historical access notes exist for this record, but have not been independently verified for current use. Request current directions from the operator or site manager rather than following an old entry description.
Questions, answered
Is West End Reefs suitable for my certification?
The record lists Deep/Advanced + experience. That does not establish suitability for every route or day. Share your training, recent experience and equipment needs with the operator and ask about the specific proposed dive.
Can I book West End Reefs through YouDive?
YouDive is an independent research directory. Contact an operator directly to confirm whether it currently runs the trip, the inclusions and the booking terms.
What you might see
Dhufish, western blue groper, yellowtail kingfish schools, mackerel, samson fish, grey nurse sharks (Shark Cave), bronze whaler (occasional), humpback whales in migration season, western rock lobster (protected)
Location
Deep offshore reefs off the western extremity of Rottnest beyond Cape Vlamingh, with flat sections broken by 10 m high spires and deep fissures in 18-30 m; includes the Radar Reef surf-break area.
Before you make plans
Conditions, access and operator schedules can change. This is a location guide, not a dive plan. Ask a local operator about current conditions and suitability for your training and experience.
Sources & further reading
marinelife.org.aurottnestisland.comRecord updated 26 Sept 2026. Source claims are being reviewed.