Berry's Beach on Phillip Island's south coast is a small bay flanked by rocky headlands, with reef diving out to around 14 m. It's slightly more sheltered than the open beaches either side thanks to the headlands, but still very much an exposed Bass Strait site. The reef holds crayfish, abalone, weedy seadragons, blue devils, sponge gardens and the kelp-and-bommie cover typical of the island's south coast. Shore entry is possible on flat days from the beach steps, otherwise boat access from Cowes. Best in light north-east winds with swell under a metre and tide near slack. Use the live 7-day wind and swell forecast on this page to plan. Intermediate divers — surf entry needs a flat day, current can run between the headlands on bigger tides, exposed enough that any south swell over a metre will shut it down.
How far you can see underwater — measured in metres. 10m+ is great, 5–10m is workable, under 3m is murk. Driven by wind, swell, and recent rain.
Long-period waves rolling in from the open ocean. Direction matters more than height — a S swell hits Portsea hard, but an E swell rolls past. Period over 12 s = real ocean punch.
Offshore (N or NE) flattens the surface and clears the water. Onshore (SE through SW) chops it up and stirs sand. Calm or light offshore is the magic combo.
This site faces the open ocean. The exposure caption above shows which directions slam in. Anything from the opposite side gets blocked — that's the safest window.
Slack water — the 30 minutes either side of high or low — is calmest and clearest. Mid-tide brings the most flow. Plan to be down at slack, up before the run picks up.
Bass Strait sits 14–16 °C autumn–winter, 17–19 °C summer. Below 16° a 7 mm hooded keeps you warm for 60 min+. Drysuit if you're going long.