Stretching for roughly 1 km along the Lonsdale side of Port Phillip Heads, Lonsdale Wall is a spectacular underwater escarpment that forms part of the Port Phillip Heads Marine National Park. This dramatic wall drops from around 12 m to 18 m depth, adorned with colourful sponges, ascidians, gorgonian fans, sea tulips, and hydroids that cling to sheer overhangs and rocky ledges. Strong tidal flows through The Heads make this an exhilarating drift environment, rewarding experienced snorkelers and divers with constant action and vibrant invertebrate life.
Lonsdale Wall
AdvancedMAYBE
MAYBE
Fair. Experienced snorkellers only.
Showing last known conditions
Wave Height 0.2 mSwell Period 11 sWind Speed 10 knPrecipitation 39 mmTidal Phase flood
Last evaluated
DANGER: Explicit Risks Present
Lonsdale Wall has hazards marked as danger. Entering the water here means you may face serious risks to your personal safety.
- Strong tidal currents danger
Port Phillip Heads experience powerful tidal flows that can sweep snorkelers away from the wall. Best dived on slack tide only.
The spot
Community-maintained
Community contribution: submitted by Daniel
Know before you go
Logged by the community, confirmed by mods
High risk: Strong tidal currents
Port Phillip Heads experience powerful tidal flows that can sweep snorkelers away from the wall. Best dived on slack tide only.
Moderate risk: Boat traffic
Located within the entrance to Port Phillip Bay, this site sees regular vessel traffic. A surface marker buoy is essential.
Low risk: Cold water temperatures
Water temperatures range from 10-18°C (50-64°F) year-round, requiring a thick wetsuit or drysuit even in summer.
Low risk: Limited visibility
Viz can drop rapidly after wind events or tidal changes; best conditions follow calm weather and neap tides.
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Getting in
Boat
Entry
Lonsdale Wall is accessed by boat from Queenscliff or Portsea. The wall lies inside Port Phillip Heads near the Lonsdale side. Common entry points are from Queenscliff Harbour (about 15-20 min run). GPS marks available from local dive shops.
Parking & facilities
Parking available at Queenscliff Harbour boat ramp and adjacent streets. Arrive early on weekends.
parkingtoiletsboat_ramp
No entry fee for the marine park itself. Boat launching fees apply at Queenscliff Harbour ramp (approx. $10-20).
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About this data
- Conditions last evaluated
- Spot data last updated
- Data sources
- Open-Meteo (marine & weather conditions), tide predictions via UTide, community contributors (descriptions, hazards, marine life).
- License
- Spot content licensed under CC BY-SA 4.0. How's the Spot is open source.
Weather & swell ┬╖ Open-Meteo marine & weather APIs Tides ┬╖ UTide harmonic analysis Sea & safety ┬╖ community reports