St Kilda Pier offers an accessible shore dive within Port Phillip Bay, featuring a mix of reef, seagrass, and muck habitats. Divers can explore depths ranging from 2 to 8 metres with an average of 4 metres. The site is suitable for beginners, with mild currents and visibility between 5 and 15 metres. Marine life includes sea stars, smooth toadfish, pink snapper, fiddler rays, and various snails. Divers should remain cautious of boat traffic from the nearby marina and potential entanglement in fishing lines. The southern blue-ringed octopus is present and must not be touched due to its venomous nature. Facilities include parking, toilets, showers, and air fills.

Williamstown Beach is a shallow shore-accessible site located on the Port Phillip Bay side of Victoria. The area features a mix of reef and seagrass habitats at depths ranging from 1 to 6 metres, with an average depth of 4 metres. Divers and snorkellers can expect mild currents and visibility between 5 and 10 metres. Entry is directly from the beach, making it a suitable location for beginners. Facilities at the site include parking, toilets, showers, and a cafe. Due to the proximity of the groyne and open water, users should remain vigilant regarding boat traffic and potential entanglement hazards from fishing lines.

Brighton Pier provides an accessible shore-entry site within Port Phillip Bay, featuring a combination of natural reef and artificial reef structures created by the pier pylons. The site is suitable for beginners, with depths ranging from 5 to 8 metres. Divers and snorkellers can expect mild currents and visibility typically between 5 and 10 metres. The pier structure serves as a focal point for marine life, though divers should remain cautious of overhead environments and potential entanglement. Boat traffic is common in the area, so maintain awareness during entry and exit. Facilities including parking, toilets, and a cafe are available nearby.

The HMAS Cerberus is a shallow wreck and artificial reef located 200 metres from the shore in Port Phillip Bay. Resting at an average depth of 4 metres, the site is accessible to beginners. Divers can observe sea stars, including the eleven-armed sea star, alongside tube worms, abalone, and snails. Rare sightings include the pot-bellied seahorse, eagle ray, common stingray, and smooth toadfish. Due to a structural collapse in 1993, the wreck is precarious; divers must remain cautious of entanglement risks and overhead environments. Sea urchins are present throughout the structure, so protective gloves and boots are recommended. Visibility typically ranges from 5 to 10 metres.

Beaumaris Bay is a shallow shore dive located on the Port Phillip Bay side of the Mornington Peninsula. The site features a mix of reef patches, seagrass beds, and sponge gardens at depths ranging from 1 to 5 metres. It is suitable for beginners, with mild currents and a typical dive duration of 40 minutes. Entry is from the shore, and the area includes facilities such as parking, toilets, and a cafe. Divers and snorkellers should remain cautious of boat traffic from the nearby yacht club and be aware of sea urchins during entry. Visibility typically ranges between 4 and 7 metres, though it can decrease following rain.

Triangle Reef, located within the Port Phillip Bay side, is a shallow shore-entry site featuring a mix of reef and seagrass habitats. With depths ranging from 1 to 10 metres and an average of 5 metres, it is well-suited for beginners and snorkellers. The site offers calm, mild conditions, though visibility varies between 4 and 10 metres. Divers should be aware of boat traffic and use a dive flag. Facilities include parking, toilets, showers, and a cafe. Accessibility is supported by a triple ramp leading from the car park to the beach. A 5mm wetsuit with hood, booties, and gloves is recommended to manage water temperatures between 11C and 21C.

Scollop Beds is a drift dive located in Port Phillip Bay, featuring a sandy bottom and reef topography. The site ranges in depth from 10 to 23 metres, with an average depth of 15 metres. Due to moderate currents, this site is suited for intermediate divers experienced in drift procedures. Visibility is typically limited, ranging from 3 to 4 metres. Access is by boat only, and divers must be aware of significant boat traffic in this active shipping area. Surface marker buoys are essential for safety. Water temperatures fluctuate between 12C and 21C throughout the year.

Frankston Pier is a shore-accessible site featuring an artificial reef structure formed by the pier pylons and a surrounding sandy bottom. The site is suitable for beginners, with depths ranging from 0 to 8 metres and an average depth of 6 metres. Visibility typically spans 5 to 10 metres. Divers and snorkellers should be aware of hazards including boat traffic, jet skiers, and fishermen on the pier. Debris such as tyres and trolleys located under the structure presents an entanglement risk. Diving early in the morning is recommended to avoid recreational boat traffic and to experience the best visibility before the water is disturbed.