Meet the site
Blue Bay is one of the best-known snorkelling and shore-dive spots in Mandurah, on the Halls Head coast south of the marina. Tourism guides describe calm conditions, colourful fish and rock pools at low tide, and the Marine Life Network describes great swim-throughs and caves with interesting small marine life in 4–8 m.
The reef is limestone, weathered into ledges, small caves and swim-throughs close to shore. Wrasse, buffalo bream, sweep, herring cale, leatherjackets and small reef fish are common, and divers searching slowly find nudibranchs, octopus, crabs and sea stars. The rock pools are good for children at low tide.
The site is relatively exposed, and visibility drops after swells above 1 m, so pick a calm day. Entry and exit are easy, but take care on the beach steps.
Blue Bay suits families, snorkellers and beginner divers, and it is Mandurah's most accessible reef dive. Combined with Roberts Point to the north, it gives a good morning of shore diving without a boat.
The Scuba Directory lists Blue Bay Reef as a boat site, but other sources describe shore access. Its coordinates should be confirmed.
The bay is popular with swimmers and families on summer weekends, so divers should use a flag, stay aware of people in the water and avoid the busiest hours. Early mornings are usually calmest and clearest. Divers wanting more depth can combine a morning here with a boat trip to the Murray Reefs or the James Service wreck offshore, both reached from the Mandurah ramps in 15–20 minutes. Water temperatures follow the Perth pattern, from about 17 °C in winter to 22–23 °C in late summer.
Research this site before booking Stored site notes may be historical. These questions highlight gaps without turning old instructions into a current dive plan.
Blue Bay (Halls Head) is recorded as Shore/Rock Platform in Mandurah & Peel. The listed access is shore. 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.
- Other water users
- Ask about vessel activity, exclusion areas and the agreed surface arrangements.
- 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 Blue Bay (Halls Head) suitable for my certification?
The record lists Open Water. 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 Blue Bay (Halls Head) 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
Wrasse, buffalo bream, sweep, herring cale, leatherjackets, nudibranchs, octopus, crabs, sea stars
Location
Sheltered bay and limestone reef at Halls Head, Mandurah, with swim-throughs, caves and rock pools.
Facilities nearby
Car park, showers and toilets near the beach.
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.augowesthandbook.com.authescubadirectory.comRecord updated 26 Sept 2026. Source claims are being reviewed.