Best Snorkeling Spots in Melbourne

Melbourne is not the first city that comes to mind for snorkeling. It should be.

Port Phillip Bay covers nearly 2,000 square kilometres. Over 80% of its marine life is found nowhere else on Earth. The piers along the Mornington Peninsula are home to weedy seadragons, seahorses, octopus, giant cuttlefish, and more than 100 species of nudibranch. In winter, thousands of giant spider crabs blanket the seafloor in one of the largest crab migrations on the planet.

You don't need scuba gear to see any of it. A mask, snorkel, and fins will get you there.

Mornington Peninsula Piers

The piers along the southern shore of Port Phillip Bay are Melbourne's best snorkeling sites. They're sheltered from ocean swells, shallow enough to snorkel comfortably, and the pylons create artificial reef systems that attract extraordinary marine life.

Flinders Pier

The premier snorkeling and diving spot in the Melbourne area. Flinders Pier sits just inside Western Port and was featured in BBC's Blue Planet II for its weedy seadragon population. Maximum depth across the pier is around 7 metres, but interesting marine life can be found at just 1-3 metres — perfect for snorkeling.

• Depth: 1-7m
• Highlights: Weedy seadragons, nudibranchs, sponge gardens, seahorses
• Best for: All levels
• Parking: Free car park at the pier

Portsea Pier

One of the most reliable spots to see weedy seadragons. The kelp forests and sponge-covered pylons are home to a dense community of marine life. Portsea sits right at the tip of the Mornington Peninsula, where bay water meets cleaner ocean water from the Heads.

• Depth: 3-8m
• Highlights: Weedy seadragons, soft corals, pufferfish, stargazers
• Best for: Confident snorkelers (slightly deeper, occasional currents)
• Note: Guided snorkel-with-seadragon tours operate from here

Rye Pier

One of Melbourne's most-loved snorkeling sites. The L-shaped pier is approximately 500 metres long and has a signposted Octopus Garden underwater exploration trail. Home to seahorses, octopus, cuttlefish, and giant smooth rays. During the right season, thousands of giant spider crabs and large schools of salmon and pike make an appearance.

• Depth: 2-5m
• Highlights: Octopus Garden trail, seahorses, smooth rays, spider crabs (May-June)
• Best for: All levels — great for families and beginners
• Tip: Night snorkeling here is exceptional with an underwater torch

Blairgowrie Pier

Near the Blairgowrie Yacht Squadron, this pier is home to over 100 species of nudibranch, vibrant sponges, hermit crabs, flathead, rays, and stargazers. It's also a key site for the annual giant spider crab migration.

• Depth: 2-7m
• Highlights: Nudibranchs, spider crab migration, dumpling squid
• Best for: All levels
• Note: Active boat pier — stay aware of vessel traffic and no-go zones

Mornington Pier

Renowned for having some of the best biodiversity of any shore site in Melbourne. Depths range from 0-10 metres and it's suitable for both snorkeling and night dives. Best visited during southerly winds.

• Depth: 0-10m
• Highlights: Smooth rays, seahorses, nudibranchs, anglerfish
• Best for: All levels

Marine Sanctuaries

Victoria's marine sanctuaries offer protected environments where marine life thrives. No fishing or collecting is allowed, which means healthier populations and less-skittish wildlife.

Ricketts Point Marine Sanctuary (Beaumaris)

The closest quality snorkeling to Melbourne's CBD. Crystal-clear shallow waters, sandstone reefs, and sea caves make Ricketts Point ideal for beginners. Drift gently over seagrass beds where baby fish, harmless Port Jackson sharks, and fiddler rays hide. The rock walls are covered in mussels and common seastars, with leatherjackets and schools of zebrafish feeding among them.

• Depth: 1-4m
• Highlights: Port Jackson sharks, sea caves, seagrass beds
• Best for: Beginners — shallow with gentle slope
• Access: ~30 minutes from CBD. Beach access along the foreshore

Jawbone Marine Sanctuary (Williamstown)

Often overlooked and less than a kilometre from Williamstown's main beach. This is the closest marine sanctuary to the CBD — 30 hectares of protected waters with jellyfish, banjo sharks, sea stars, and other marine life. A hidden gem most people walk right past.

• Depth: 1-3m
• Highlights: Banjo sharks, sea stars, close to CBD
• Best for: Beginners — calm and shallow

Bellarine Peninsula

St Leonards Pier

On the western side of Port Phillip Bay, St Leonards Pier juts into the bay at the end of the Bellarine Peninsula. Over the years, the pylons have attracted a diverse community — seahorses, nudibranchs, puffer fish, stargazers, and rays on a typical afternoon. Octopus and dumpling squid tend to appear at night.

• Depth: 2-6m
• Highlights: Seahorses, stargazers, night snorkeling
• Best for: All levels

Ocean Spots (Advanced)

These spots are exposed to ocean swells and currents. Only suitable for confident, experienced snorkelers on calm days.

Diamond Bay (Sorrento)

A sparkling ocean beach tucked behind holiday homes. Rock ledges, overhangs, kelp beds, reefs, and small walls with crayfish, old wives, boarfish, abalone, and schooling fish. Exposed to ocean swells — requires a calm day with no swell.

Mushroom Reef Marine Sanctuary (Flinders)

Protects 80 hectares of open coast at Flinders on the Mornington Peninsula. At low tide, the sea retreats to reveal the huge mushroom-shaped reef the sanctuary is named for. A deeper snorkeling spot that can be quite exposed to ocean swells.

What You'll See

Port Phillip Bay's marine life is genuinely world-class. Here's what to look for:

• Weedy seadragons — Victoria's marine emblem, found at most pier sites year-round
• Seahorses — Tiny and well-camouflaged on pier pylons and seagrass
• Octopus — Common at Rye Pier, especially at night
• Nudibranchs — Over 100 species, from tiny to spectacular
• Giant smooth rays — Wingspan up to 2 metres, gentle and common
• Port Jackson sharks — Harmless bottom-dwellers, especially at Ricketts Point
• Cuttlefish — Masters of colour change, found around pier pylons
• Giant spider crabs — Thousands migrate to shallow water May-June
• Blue-ringed octopus — Beautiful but venomous, look but don't touch

Seasonal Guide

• Summer (Dec-Feb) — Warmest water (18-23°C), good visibility in southern bay. Calamari breeding season in Beaumaris to Brighton. Busiest period
• Autumn (Mar-May) — Water still warm, visibility often excellent. Fewer crowds. Spider crabs begin arriving in late May
• Winter (Jun-Aug) — Coldest water (10-13°C) but often the best visibility. Spider crab migration peaks. Seadragon breeding season (males carry eggs). Fewer snorkelers means more wildlife encounters
• Spring (Sep-Nov) — Water warming up, seadragon eggs hatching. Good all-round conditions

Gear Essentials

Melbourne's water is colder than most popular snorkeling destinations. The right gear makes the difference between a magical experience and a miserable one.

• Wetsuit — 3mm for summer, 5mm with hood and gloves for winter. This is non-negotiable — without neoprene, even summer sessions will be cut short
• Mask — Low-volume mask with tempered glass. A proper fit is more important than brand
• Snorkel — Simple J-tube or semi-dry. Avoid full-face snorkel masks — they fog easily and restrict breathing
• Fins — Open-heel fins with neoprene booties for warmth, or closed-heel fins for simplicity
• Weight belt — 2-4kg helps you stay neutral with a wetsuit instead of floating on the surface
• Torch — Essential for night snorkeling, useful anytime for peering into crevices and under ledges

For a full cost breakdown, see our guide to freediving costs in Melbourne.

Tips for Better Snorkeling

• Check the wind — Aim for days with winds under 10 knots, ideally from the north-east. Southerly winds stir up the bay
• Avoid post-rain — Wait 48 hours after heavy rain before snorkeling in northern Port Phillip Bay. Stormwater runoff drops visibility to near zero
• Try night snorkeling — An underwater torch reveals nocturnal species that hide during the day. Octopus, cuttlefish, and dumpling squid all come alive after dark
• Snorkel the pylons — Pier pylons are artificial reefs. Move slowly along them, checking every surface — marine life clings to every centimetre
• Look small — The most interesting creatures in Port Phillip Bay are often tiny. Nudibranchs, juvenile seahorses, and decorator crabs are easily missed
• Use a float — A bright dive float or inflatable buoy makes you visible to boats and jet skis. Some piers have heavy boat traffic

Safety

• Never snorkel alone — Always go with a buddy
• Be visible — Use a dive float, especially near piers with boat traffic
• Know your limits — If conditions look rough, don't go in. There will be another day
• Check tide and current — Some sites (especially near the Heads) have strong tidal currents
• Don't touch anything — Blue-ringed octopus, stonefish, and other venomous species are present
• Enter and exit carefully — Pier ladders and boat ramps can be slippery

From Snorkeling to Freediving

Most freedivers in Melbourne started as snorkelers. The progression is natural — you see something interesting at the surface, and you want to get closer. You take a breath, duck under, and suddenly you're in a different world.

If you find yourself doing this more and more, a freediving course will teach you to do it safely and effectively. You'll learn proper breath-hold technique, equalisation (clearing your ears as you descend), and the buddy safety protocols that make deeper dives possible.

With a Level 1 freediving course, you'll be comfortable diving to 10-16 metres on a single breath — enough to explore the full depth of every pier site on this list.

See our guide to choosing a freediving course in Melbourne to get started.

Frequently Asked Questions

Where is the best snorkeling in Melbourne?

The Mornington Peninsula piers — Flinders Pier, Portsea Pier, Rye Pier, and Blairgowrie Pier — are Melbourne's best snorkeling spots. Each offers shallow, sheltered water with diverse marine life including weedy seadragons, octopus, and nudibranchs. For shore snorkeling closer to the city, Ricketts Point Marine Sanctuary in Beaumaris is excellent for beginners.

Can you snorkel in Port Phillip Bay?

Yes. Port Phillip Bay is one of the best snorkeling destinations in Victoria. The bay is sheltered from ocean swells, relatively shallow, and home to marine life found nowhere else on Earth — including weedy seadragons, giant spider crabs, seahorses, and over 100 species of nudibranch.

What can you see snorkeling in Melbourne?

Weedy seadragons, seahorses, octopus, cuttlefish, nudibranchs, smooth rays, Port Jackson sharks, blue-ringed octopus, leatherjackets, and seasonal visitors like giant spider crabs (May-June). Over 80% of the marine life in Port Phillip Bay is found nowhere else on Earth.

Do you need a wetsuit to snorkel in Melbourne?

Yes. Water temperatures range from 10-13°C in winter to 18-23°C in summer. A 3mm wetsuit is sufficient for summer, while a 5mm wetsuit with hood and gloves is recommended for winter. Without a wetsuit, even summer water temperatures will limit your time in the water.