Lonsdale Bommies

Victoria, Australia

Depth

20m

Visibility

2m - 5m

Entry

Boat

Experience Level

Beginner

Lonsdale Bommies

Victoria, Australia

Depth

20m

Visibility

2m - 5m

Entry

Boat

Experience Level

Beginner

About Lonsdale Bommies

Approximately 1 kilometre from the Point Lonsdale Lighthouse and clear of the shipping channel, just outside Port Phillip Heads is an area of spectacular bommies and underwater rock formations with tidal movement created swim throughs. A favourite spot for catching Crays. This is a great dive site with fantastic swim throughs.

Lonsdale Bommies Dive Info

Terrain & Features

Rock, Reef

Entry Type

Boat

Max Depth

20m

Visibility Range

2m – 5m

Experience Level

Beginner

Best Gas Mix

21% – 47%

O₂

CNS Load (35 min)

12% at 18m / 36%

O₂

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Marine Life

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Weather Conditions

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Location

Location details missing.

Dive Site Hazards

Bubble Trapping Under Overhangs — Rock overhangs can trap exhaled bubbles, reducing visibility and causing disorientation.
Reflected Surge Patterns — Surge reflecting off rock faces can create irregular and unpredictable water movement.
Current Funnel Effect — Narrow gaps between rocks can accelerate water flow unexpectedly.

Hidden Depth Variations — Complex reef topography can conceal depth changes, leading to unintended profile variations.

Distraction from Marine Activity — High fish activity can distract divers and delay depth or gas awareness.

Rapid Surge Direction Changes — Surge near reef structures can reverse direction quickly, pushing divers sideways into unexpected areas.

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