Meet the site
Bluefish Valley is a natural amphitheatre cut into the base of the North Head cliffs beside Bluefish Point, a gully with sheer walls on both sides and a floor of kelp-covered boulders at about 7 m, opening onto the reef edge at 16 m. It is the northern counterpart of Magic Point at Maroubra: a grey nurse shark colony and mating site where the critically endangered sharks are present all year, typically 10–20 animals from 1.5 m juveniles to 3.5 m adults, with numbers building from December to a peak in April and May. Sydney Dive Charters, which developed the site as a guided dive, rates it Open Water level and ideal for first boat divers because it is shallow, enclosed, and almost never has current or surge. The sharks are the reason to come, but the valley holds a lot else. Giant cuttlefish sit among the boulders, wobbegongs sleep in the kelp, big blue groper follow divers, octopus and moray eels occupy the cracks, southern pomfret and old wives school under the walls, and bull rays, eagle rays and weedy sea dragons are all regular. The walls carry soft corals and sponges in the shade. Visibility is the same as Bluefish Point, often 15 m and occasionally 40 m in winter blue water. Grey nurse sharks are protected and a code of conduct applies at all aggregation sites: no more than a small group in the gutter at a time, stay low and to the side, no touching, feeding, chasing or flash directly in their eyes, and no scooters. Because the valley is enclosed, disciplined behaviour matters more here than at open sites, and the operator keeps groups small for that reason. It suits new divers who want a shark encounter in gentle conditions, photographers with wide-angle lenses, and anyone diving Manly between December and June; it pairs with Bluefish Point or the North Head sponge gardens for a second dive.
What you might see
Grey nurse sharks (10–20, year-round, peak Apr–May), giant cuttlefish, wobbegongs, blue groper, southern pomfret, old wives, bull rays, eagle rays, weedy sea dragons, octopus, moray eels
Location
Sheltered kelp-and-boulder valley between sheer sandstone walls near Bluefish Point on the outer face of North Head, 5–16 m, home to a year-round grey nurse shark colony and mating site.
Before you make plans
Conditions, access and operator schedules can change. This is a location guide, not a dive plan. Ask a local operator about current conditions and suitability for your training and experience.
Sources & further reading
sydneydivecharters.com.ausydneydivecharters.com.ausydneydivecharters.com.auRecord updated 26 Sept 2026. Source claims are being reviewed.