Kilcunda Reef sits off the small coastal town of Kilcunda on the Bass Coast in South Gippsland, with reef diving out to around 14 m. It's an exposed open-coast site facing south into Bass Strait, well off the well-trodden Mornington Peninsula track and quieter for it. The reef holds crayfish, abalone, weedy seadragons, blue devils and the standard kelp-and-sponge cover, with deeper sand patches dropping off the back. Shore access is possible from the beach at Kilcunda, or boat access from the small ramp. 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 — exposed Bass Strait coast, surf entry if you go from shore, swell shuts it down quickly so check the forecast before you leave home.
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.