Beware Reef sits about 6 km offshore from Cape Conran in East Gippsland, in around 18 m of water and protected as a marine sanctuary. The reef is one of the best-kept secrets of Victorian diving — granite outcrops covered in temperate sponge gardens, gorgonian fans, kelp canopy and bommies, with prolific fish life because of the no-take protection. Expect blue devils, weedy seadragons, big snapper, schools of yellowtail kingfish, banjo sharks and regular Australian fur seal interactions from the nearby colonies. Boat access only, run from Marlo, Cape Conran or Mallacoota. Best in light north-westerly winds (offshore at this site), swell under a metre and tide near slack. Use the live 7-day wind and swell forecast on this page to plan. Advanced divers — offshore reef, current on tide change, exposed Bass Strait, plan a settled forecast for the run out and back.
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.