Mosman sits on the north shore of Sydney Harbour, and the diving here is defined by the sheltered harbour environment rather than open ocean swell. Four sites range from the very shallow, protected Balmoral Baths to the advanced wreck of the T.S.S. Currajong, which rests at depth offshore in variable visibility that can fall to near zero. Chowder Bay offers a mix of reef, muck, seagrass, and a small wreck accessible from shore. The species list is rich in macro subjects: pot-bellied seahorses, nudibranchs, fiddler rays, and eastern red scorpionfish are all recorded here. Water temperature follows a Sydney harbour temperate cycle, warmest in late summer and coolest in late winter. Seven operators service this area, the highest operator count among the regions listed.
Monthly water temperature across Mosman's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
Harbour water temperatures track closely with oceanic Sydney conditions, sitting in the high teens through the cooler months and climbing to the low-to-mid twenties in summer. Visibility in the harbour can be strongly affected by rainfall and runoff, and the T.S.S. Currajong site is known for low-visibility conditions requiring torches. Calmer summer conditions and reduced runoff typically bring the clearest water to the shallower sites.
6 operators
Point Piper, Australia
Sydney, Australia
Balmain, Australia
Haymarket, Australia
Sydney, Australia
Water temperature around Mosman ranges from about 18°C in August to 24°C in February, based on satellite sea-temperature data for its dive sites.
In the warm season (about 24°C) a 3mm full suit is comfortable in Mosman; in the coldest months (about 18°C) step up to a 5mm suit.
Fin maps 4 sites in Mosman (4 scuba diving sites and 1 snorkelling spots, with some suited to both).
Across Mosman's dive sites, January, February, April and September are most often reported as the best months to visit.
1 more site to explore
