Dive-site story
Osborn Shoals sits offshore in Bate Bay near Cronulla. Rugged sandstone gutters, broken boulder fields, and dense kelp beds cut through the reef before dropping into sandy clearings. Oceanic swells drive heavy water movement across the exposed rock, sustaining a classic New South Wales temperate reef ecosystem.
Sandstone gutters and kelp-covered boulder formations
Congregating Port Jackson sharks during the cooler winter months
Eastern blue gropers trailing divers along kelp edges
Location
Use the map to plan with your operator and confirm the exact entry point on the day.
Seasonality
Late autumn through winter brings cooler, clearer water alongside aggregations of breeding Port Jackson sharks.
Marine life
| Species | Likelihood | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Eastern Blue GroperAchoerodus viridis | Common | ||||||||||||
| Port Jackson SharkHeterodontus portusjacksoni | Seasonal | ||||||||||||
| Spotted WobbegongOrectolobus maculatus | Common | ||||||||||||
| Australian Giant CuttlefishSepia apama | Seasonal | ||||||||||||
| Weedy SeadragonPhyllopteryx taeniolatus | Rare |
Marine forecast
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