Meet the site
Mary Cove is a small, quiet south-coast cove listed in SeaLink's guide to Rottnest snorkelling as a picturesque spot with clear waters and rocky outcrops that avoids the crowds, with bream, snapper and occasional sea turtles. It lies west of Salmon Bay on the road toward the West End, far enough from the settlement to keep visitor numbers low.
The cove's limestone outcrops break up the sand and seagrass, giving shelter for reef fish and invertebrates close to shore, and the south coast's clear water and Leeuwin Current influence mean a mix of temperate and tropical species. It is a snorkel rather than a scuba site.
It suits confident snorkellers cycling the south coast who want a quiet spot. Because it faces the Southern Ocean, conditions depend heavily on swell rather than just wind: SeaLink's list of suitable winds is generous, but any significant southerly swell will make the cove surgy. On a calm day, however, it is an attractive and uncrowded swim.
Published detail is limited to the SeaLink listing, so depths and coordinates are approximate. Bring water and sun protection, as there are no facilities.
Mary Cove combines well with Salmon Bay and Little Salmon Bay on the way back to the settlement, choosing whichever is calmest.
Rottnest's south coast is where the warm Leeuwin Current has most influence, which is why the corals and tropical fish in these bays are unusual for a location so far south. The Rottnest Island Reserve bans spearguns and handspears across all island waters. The general rule is simple: in a northerly or easterly, snorkel the south side; in a southerly, go to the north-coast bays instead.
Research this site before booking Stored site notes may be historical. These questions highlight gaps without turning old instructions into a current dive plan.
Mary Cove is recorded as Shore/Rock Platform in Rottnest Island. 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.
- 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 Mary Cove suitable for my certification?
The record lists Snorkel/Any. 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 Mary Cove 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
Bream, pink snapper (juveniles), western king wrasse, occasional sea turtles, seagrass fauna
Location
Small, picturesque cove on the south coast of Rottnest with clear water and rocky outcrops, away from the crowds.
Facilities nearby
No facilities; bring water.
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
sealink.com.auRecord updated 27 Sept 2026. Source claims are being reviewed.