Portsea Pier is a shore-accessible site in Sorrento, Victoria, featuring a mix of artificial reef structures, natural reef, kelp forest, and seagrass. Divers and snorkellers can explore the pier pylons at depths ranging from 2 to 7 metres, with an average of 4 metres. The site is suitable for beginners, though conditions vary significantly. Strong tidal currents are a primary hazard, particularly near the entrance to Port Phillip Bay, necessitating careful planning around slack water. Visibility ranges from 5 to 25 metres, though the silty bottom can reduce clarity. Boat traffic is a constant risk, making the use of a surface marker buoy essential for safety.

Portsea Hole is a wall dive located 500 metres offshore near Sorrento, Australia. The site features a dramatic wall dropping from shallow reef to a depth of 30 metres, with an average depth of 15 metres. Due to strong currents, this site is strictly for advanced divers and must be conducted at slack water. Visibility typically ranges from 5 to 10 metres. Access is by boat only, and divers must remain vigilant regarding boat traffic. Water temperatures fluctuate between 13C and 18C throughout the year. Facilities including equipment rental, air fills, and boat charters are available nearby.

Scallop Drift Dives in Sorrento is a drift dive site characterised by strong currents within Port Phillip Bay. Divers are transported by boat to the site, which consists of sandy ground scattered with scallops. The site ranges in depth from 5 to 15 metres, with an average depth of 10 metres. Visibility typically fluctuates between 6 and 15 metres. Due to the strong currents and boat traffic, this site is suited for intermediate divers. Divers must be vigilant regarding boat traffic and current strength. Water temperatures vary by season, ranging from 13C in winter to 19C during the summer months.

Queenscliff Bottle Drift is a drift dive located in the deeper waters of Port Phillip Heads near Sorrento. The site features a reef topography with depths ranging from 18 to 26 metres. Divers experience moderate currents, making this an intermediate-level dive best suited for those comfortable with drift procedures. Visibility typically ranges from 10 to 20 metres. Due to high boat traffic and shifting currents, boat access and guided tours are required. Species recorded around this area include Weedy Seadragons, Giant Cuttlefish, Fiddler Rays, and Western Blue Devils. Water temperatures fluctuate between 13C and 19C throughout the year, necessitating appropriate thermal protection.

Quarantine Station Wall is a shore-entry drift dive located in Sorrento, Australia. The site features a vertical wall ranging from 12 to 20 metres in depth. Divers experience moderate currents that carry them along the wall, with visibility typically between 10 and 30 metres. While suitable for beginners, the site requires careful planning due to the potential for strengthening currents and significant depth. Species recorded around this area include Giant Cuttlefish, Weedy Seadragon, Pot-bellied Seahorse, Blue-ringed Octopus, Fiddler Ray, Stonefish, Chromodoris Nudibranch, Western Blue Devil, Smooth Ray, Bobtail Squid, Long-nosed Fur Seal, Port Jackson Shark, and various wrasses.

London Bridge Rockpool in Sorrento is a shallow shore-entry site with depths ranging from 0 to 2 metres. This ocean-facing location is suitable for beginners, though it requires careful planning due to significant environmental hazards. The site is unpatrolled and features rough surf, strong currents, and unstable cliffs. Snorkelling should only be attempted at low tide during calm sea conditions to avoid waves washing over the rock platform. Visibility is variable, typically between 1 and 3 metres. Visitors should wear sturdy footwear to navigate slippery rocks and sharp surfaces during entry and exit. Parking and toilets are available at the site.

Sorrento Pier is a shallow shore dive located 20 metres from the beach in Blairgowrie. The site features a sandy bottom and pier pylons at depths between 3 and 6 metres. Diving here requires advanced skills due to extremely strong currents and heavy ferry traffic. Divers must use a surface marker buoy and plan dives strictly around slack water to avoid being swept away or pulled into ferry propellers. Visibility typically ranges from 4 to 7 metres. The site is suitable for night diving, with parking and a cafe available nearby. Divers should exercise caution regarding entanglement in ropes and debris found around the pier structure.

Chimanan's Hat is an artificial reef located 3000 metres offshore from Sorrento in the South Channel of Port Phillip Bay. This site features shallow depths ranging from 1 to 12 metres, with an average depth of 4 metres, making it suitable for beginners. Access is strictly by boat. While the area is generally calm, it is situated within a shipping channel, necessitating caution regarding boat traffic and the use of a delayed surface marker buoy. Tidal currents can occur, though they are typically mild. Water temperatures fluctuate between 13 and 19 degrees Celsius, requiring a wetsuit year-round. Divers should be aware of potential hazards including jellyfish and local marine life interactions.