Rye Pier is a great entry point into diving in Port Phillip Bay, offering easy shallow waters of 2 to 6 metres and good visibility of 5 to 10 metres. The mix of reef, seagrass beds and sandy muck makes for surprisingly varied diving right from the shore. This is prime seahorse territory, with both Big-bellied and Short-headed Seahorses found here, along with Tasseled Anglerfish and a good range of nudibranchs tucked into the substrate. Smooth Rays and Stingarees cruise the sandy patches, while Giant Spider Crabs appear in numbers during warmer months. Keep a respectful distance from any Blue-ringed Octopus you encounter. Currents are mild, making this manageable for new divers.

The 10 Channel Marker is a drift dive along a navigation marker in Port Phillip Bay, where a moderate current does most of the work for you as you cruise at 12 metres depth. Visibility typically runs between 5 and 10 metres, which is perfectly workable for spotting the site's highlights. Keep your eyes on the sandy bottom and surrounding structure for weedy seadragons, seahorses, octopus, and cuttlefish. Stingrays and spider crabs are common finds, and Port Jackson sharks sometimes rest nearby. Playful seals occasionally pass through. The current means you need basic buoyancy control sorted before heading here, but the depth is manageable for newer divers.

Blairgowrie Pier is a genuine highlight for new divers in Victoria, offering easy shallow waters between 2 and 7 metres with visibility that can reach 25 metres on a good day. The pylons and surrounding reef attract an impressive variety of critters, including seahorses, nudibranchs, octopus, and cuttlefish. Patient divers scanning the sandy bottom may spot camouflaged tasselled anglerfish and stargazers. Giant spider crabs congregate here in numbers, and stingrays are a fairly regular presence. The mild current makes it manageable for beginners, though the water is cold year-round so a good wetsuit is essential.

South Channel Fort is a submerged historical structure that now doubles as an artificial reef, giving beginner divers something genuinely interesting to explore in relatively shallow water. Depths run from 5 to 12 metres, so you have plenty of time to look around without rushing your no-decompression limits. Visibility typically sits around 10 to 12 metres, which is good for Victoria's bay diving. Fish are the main attraction here, using the fort's structure as shelter and feeding ground. Be aware that moderate currents can run through the site, so pick a settled day and stay close to the structure where the water moves less. Boat traffic in the channel is a real hazard, so maintain good buoyancy and stay well below the surface.

Bridgewater Bay Rock Pool is a sheltered shore entry site suited to beginner divers and snorkellers looking to explore a temperate reef in easy shallow waters. Depths range from 1 to 8 metres, and while visibility can be variable, calmer days reward you with sightings of seahorses, cuttlefish, octopus, and boxfish moving through kelp and sea sponges. Stingrays rest on sandy patches, and juvenile fish shelter around the reef structure. Watch your footing near sharp coral on entry and exit, and give any marine life plenty of space. A mild current keeps conditions manageable for newer divers.

Rosebud Pier is a great entry point into diving for anyone new to the sport. The shallow depth of 2 to 8 metres keeps things manageable, and visibility ranging from 5 to 15 metres means you can actually see what you are looking for. The pier piles and surrounding seagrass beds act as an artificial reef, attracting weedy sea dragons, big-belly seahorses, giant cuttlefish, and octopus. Rays and squid pass through regularly, while crayfish, shrimp, sponges, and sea stars fill in the quieter corners. The current is mild, so you can take your time without fighting the water.

Sorrento Pier is a muck and reef dive that rewards patient, detail-oriented divers willing to work for their sightings. The site sits in easy shallow waters of 3 to 6 metres, but visibility is highly variable and strong currents running through Port Phillip Heads make timing critical. Boat traffic adds another layer of complexity, so a surface marker buoy is non-negotiable. Underneath the pylons and along the sandy bottom, you can find weedy seadragons, seahorses, blue-ringed octopus, cuttlefish, nudibranchs, and goblin squid. Stingrays and the occasional seal also pass through. Autumn and winter months tend to produce the best conditions.

Diamond Bay rewards advanced divers who can handle strong currents and surge with an impressive range of temperate marine life in relatively shallow water. Depths sit between 4 and 9 metres, with visibility running 5 to 10 metres depending on conditions. The current here is no joke and should be your primary planning consideration. Weedy sea dragons are the headline act, but Port Jackson sharks, swell sharks, and stingrays are regular sightings. Boarfish, old wives, wrasse, and leatherjackets round out the fish life, while crayfish and abalone work the substrate. Summer months from December through March offer the most reliable conditions.