Cabbage Tree Bay's crown jewel, Shelly Beach sits within one of Sydney's most beloved marine sanctuaries just a 20-minute ferry ride from the CBD. The only beach on Sydney's east coast to face west, it occupies a scenic corner of Manly's ocean beachfront — a sheltered, west-facing cove that keeps the swell honest and the water surprisingly clear, even when the ocean around it is churned up.
The Dive
White sand and a natural reef of tumbled boulders and rocks descend to a maximum depth of 12 metres, making this an ideal site for newer certified divers and seasoned underwater photographers alike. As part of Cabbage Tree Bay Aquatic Reserve, this shore dive has over 200 recorded species of bony fish. The classic route is simple: follow the rocks along the right-hand side, working your way through kelp-draped boulders before the reef gradually opens up into the bay. The best of the site lies further out than most divers reach — swim until the wall turns northwards and follow the remnants of the rock wall along the sea floor until you reach a kelp bed, where weedy sea dragons are frequently found.
Marine Life
The reserve's strict no-take status means the wildlife here is genuinely fearless. The Eastern Blue Groper often acts as an escort for the entire dive. Deeper into the bay, wobbegong sharks, Port Jackson sharks, and blue-ringed octopus are regular residents — the latter typically tucked into the rocky heart of the cove. Keep an eye on the sandy bottom: stingrays, fiddler rays, flatheads, and old wives are commonly spotted. Seasonality rewards return visits — July often brings breeding giant cuttlefish to the bay in spectacular colour-changing displays. Early in the dive, it's worth leaving the rocks briefly to search for a small motorcycle wreck resting on the sand — a quirky local highlight.
Conditions & Access
Shelly Beach is generally protected during easterly winds, making it diveable when many other Sydney sites are blown out. Visibility can range from 3 to 15 metres, typically clearer during the winter months. The beach is easily reached on foot from Manly — a small coastal path, Marine Parade, leads there in about 10 minutes. Entry is straight off the sand, with gear-rinse facilities and a café nearby. Arrive early — there is only one main road to the beach, which can become severely congested around sunset.
Recommended ISC Certifications
Shelly Beach is diveable on an ISC Open Water Diver certification — the shallow, protected conditions and easy shore entry make it one of Sydney's most accessible first post-certification dives. To get the most from repeat visits, consider adding:
ISC Night Diver — The reserve transforms after dark. Octopus, cuttlefish, and crustaceans emerge in force, and the absence of day-trippers means you'll often have the reef entirely to yourself.
ISC Enriched Air Diver (Nitrox) — With such a rich site at a shallow 12 metres, nitrox extends your no-decompression bottom time significantly, letting you linger over that cuttlefish or follow a blue groper for longer on multiple dives in one day.
ISC Underwater Photographer — Over 200 recorded species of bony fish, plus bull rays, wobbegong sharks, and dolphins make Shelly Beach a macro and wide-angle photographer's dream. Learn to work in shallow ambient light and capture the bay's incredible biodiversity.
Recorded here
Marine life divers have actually logged at this site.