Dive-site story
Located off the coast of Fremantle, Rottnest Island features an extensive network of limestone caverns, swim-throughs, and overhanging ledges shaped by ocean swells. The marine park sits at an ecological crossroads where the warm south-flowing Leeuwin Current mixes tropical species with temperate Western Australian endemics. Divers explore dramatic topography ranging from shallow kelp-covered reef systems in sheltered bays to deep drop-offs and shark aggregation caves along the outer perimeter.
Extensive limestone cave systems, caverns, and chimney swim-throughs
Unique intersection of tropical and temperate marine ecosystems fueled by the Leeuwin Current
Encounters with grey nurse sharks and resident Western blue groper
Location
Use the map to plan with your operator and confirm the exact entry point on the day.
Seasonality
Late summer and autumn bring the warmest water and most stable visibility, coinciding with calm easterly morning winds.
Marine life
| Species | Likelihood | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Western Blue GroperAchoerodus gouldii | Common | ||||||||||||
| Grey Nurse SharkCarcharias taurus | Seasonal | ||||||||||||
| Port Jackson SharkHeterodontus portusjacksoni | Seasonal | ||||||||||||
| Western Rock LobsterPanulirus cygnus | Common | ||||||||||||
| Samson FishSeriola hippos | Common |
Marine forecast
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