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Little Armstrong Bay

Rottnest Island, Australia
★ 4.0 (1 review)
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Beginner

Shallow bay with spectacular limestone caves and swim-throughs.

Boat Access
6m Avg Depth
10m Max Depth

About this dive site

This dive site features a stunning limestone reef system honeycombed with caves, ledges, and swim-throughs. The clear, shallow waters host a rich diversity of temperate marine life, including the iconic Western Blue Devil and large crayfish. It is an excellent site for photographers and for exploring unique underwater topography in calm conditions.

Diving Freediving Snorkeling

Site Ratings

Big Marine Life Good
Macro Marine Life Very Good
Landscape Quality Excellent
Water Visibility Very Good Viz
Famousness Well Known

Plan Your Visit

limestone reefcavernswim-throughbeginner friendlymacro photographywide anglesharkturtleaustraliaperth

Marine Life

Western blue devilharlequin fishcrayfishwobbegong sharkport jackson sharkbuffalo breamboxfishsoft coralssponges

Things to Note

Difficulty:

Beginner

Shallow, protected bay with clear water and minimal currents, ideal for training and new divers.

Hazards:
boat traffic
Current Strength:

Mild

Diving Conditions

Water Temperature Now: 18.8°C

Wind

Tide

Swell

Swell Height (m)
Swell Period (s)

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