Extreme Watersport Dive Atlas · VIC-004
Portsea Hole Diving
A submerged depression off Portsea, within Port Phillip Heads Marine National Park. The deeper basin gives this site a different profile from the nearby foreshore and pier dives.
Current status
Protected waters off Portsea
Portsea Hole is a named area of Port Phillip Heads Marine National Park. Parks Victoria warns of strong currents, rough water and deep areas. No site-specific closure was identified in the official sources reviewed; that is not confirmation of conditions or access for a planned trip.
Quick dive brief
The place, at a glance
- Site type
- Submerged depression / reef
- Locality
- Portsea · southern Port Phillip
- Published depth context
- Official site page: up to 30 m
Locality map
General named site locality
Approximate Portsea Hole locality
The marker places Portsea Hole in its general setting off the Portsea foreshore. It does not mark a park boundary or a descent point.
- Approximate Portsea Hole locality
- Interactive basemap context
Parks Victoria · named site in the divers guide opens in a new tab
Locality context only — not a boat drop, mooring or navigation aid. · © OpenStreetMap contributors
Locality
Off Portsea, within the Heads marine park
Parks Victoria identifies Portsea Hole off the Portsea foreshore. It is a distinct underwater feature, separate from Portsea Pier. Official publications give differing offshore distances; the map represents the approximate named locality.
Sources: Parks Victoria · Parks Victoria
Boat access
Access by boat
The Parks Victoria divers guide identifies this as a boat dive. Charter and private-vessel arrangements differ; the Atlas does not identify a departure route. The guide describes yellow boundary marks, not dive moorings. Navigation aids must not be used as tie-up points. No public mooring availability is verified here.
Sources: Parks Victoria · Ports Victoria
Site character
A deeper basin in the bay
The official site description relates the depression to the former Yarra River valley. The defining feature is the deeper basin and its reef setting, rather than a built structure.
Sources: Parks Victoria
Depth
Two published depth descriptions
The current Parks Victoria site page describes depths up to 30 m. Its divers guide gives 12–32 m for the hole. These are different published descriptions, not a reconciled survey: this page does not relabel 12 m as a surrounding seabed or 32 m as a newly verified maximum.
Sources: Parks Victoria · Parks Victoria
Conditions
Depth and moving water
Portsea Hole
Current Weather
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- Wind
- — · — Gust unavailable
- Rain
- —Precipitation
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Timestamped atmospheric weather near this site. Offshore water movement, swell, visibility and dive conditions can differ and are not measured here.
Parks Victoria’s warnings about currents, rough water and depth are relevant to planning here. A coastal weather reading would not measure the water movement at the hole. No tide window or live diveability rating is supplied.
Sources: Parks Victoria
Community observations
Recent Diver Reports
Visibility, water temperature and small details from recent dives.
Loading recent diver reports…
Reviewed observations from individual dives—not live sensor data or dive-suitability assessments.
Protection
Marine national park protection
Fishing and taking marine animals, plants or other material are prohibited within marine national park waters. Confirm the relevant boundaries and current notices; this guide does not map a vessel operating area.
Sources: Parks Victoria
Planning
Before arranging a dive
Review current marine notices and the relevant park or heritage rules before arranging a trip. Confirm the site and access arrangements with the skipper or dive provider. Published depth describes a feature; it does not establish suitability for a particular diver or the conditions on the day.
Sources: Parks Victoria · Ports Victoria
FAQ
Questions about this site
Is Portsea Hole the same site as Portsea Pier?
No. Portsea Hole is a submerged marine park feature off Portsea. Portsea Pier is a separate foreshore structure.
Is this a boat dive?
Yes. Parks Victoria identifies Portsea Hole as a boat dive. Vessel access and trip arrangements need separate confirmation.
How deep is Portsea Hole?
Parks Victoria’s site page says up to 30 m; its divers guide gives 12–32 m. The guide retains that difference rather than claiming a newly surveyed maximum.
Can the yellow marks be used as moorings?
The divers guide describes boundary marks, not dive moorings. Harbour Master’s Directions prohibit tying vessels to navigation aids.
Change log
Source review · 8 September 2026
Initial guide prepared from the sources below. Current operational arrangements require separate confirmation.
Evidence & boundaries
Sources & page limits
This is a source-led guide, checked on 8 September 2026. Official publications support the site context below; this page is not a live access clearance or a navigation aid. No Extreme Watersport field photographs or recent site survey have been added. Current observations, mooring availability and local conditions need separate confirmation.