Slack-water boat dive into a drowned section of the old Yarra River bed off Portsea: a sponge-covered wall from 12 metres to sand at 27 and a bowl at 33, in a marine national park.
Visibility at Portsea Hole
Underwater visibility at Portsea Hole shifts with swell, wind and recent rainfall rather than holding to a fixed range. Slack water only (flood or ebb) generally offers the best conditions for diving here.
Air, gear and guides near Portsea Hole
Browse dive shops in Melbourne for fills, hire gear, servicing and guided dives at this site.
Region: Port Phillip Heads, VIC
Skill Level: Advanced
Depth: 12-33m
Water Temperature: 12-18°C
Best Time to Dive: Slack water only (flood or ebb)
Marine Life: Southern blue devil, barber perch, southern hulafish, silver sweep, butterfly perch, jackass morwong, gurnards, bluespotted goatfish; sixteen types of sponges, soft corals
Hazards: Strong tidal currents outside slack water make ascents difficult; depth to 33m; nearby shipping channels and heavy boating traffic
Facilities: None (boat dive). Charters from Portsea, Sorrento and Queenscliff; boat ramps at Sorrento and Queenscliff