Norman Island sits off the south-west of Wilsons Promontory, a granite island with reef diving out to around 18 m. Like the rest of the Wilsons Prom offshore islands it's exceptional when conditions line up — thick kelp, sponge gardens, gorgonian fans, crayfish, abalone, weedy seadragons, blue devils and frequent fur seal interactions from the resident colonies on neighbouring islands. Boat access only, charter trips run out of Port Welshpool or Tidal River. Best in light northerlies with swell under a metre and tide near slack. Use the live 7-day wind and swell forecast on this page to spot a flat day. Advanced divers — exposed Bass Strait, currents around the island corners, remote location with serious run times each way. Pick a settled forecast, kit up properly, and don't push through marginal conditions on the day.
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.