Discovery Bay Marine National Park (offshore reefs)

High risk: Strong currents and undertows

Powerful Southern Ocean currents and undertows can be hazardous for snorkellers, especially near reef edges.

High risk: Exposed coastline conditions

The coastline is remote and highly exposed; conditions are often unsuitable for diving and snorkelling, requiring calm seas and careful weather assessment.

Moderate risk: Large unexpected waves (sneaker waves)

Exposed coastline experiences one of the highest wave energy environments in Victoria; sudden large waves can sweep people off rock platforms.

Moderate risk: Changing tides

Some points of the park become impassable at high tide; tide timing is critical for safe entry and exit.

Moderate risk: Remote location & limited services

The park is remote with limited mobile reception and few facilities; emergency help is far away.

Moderate risk: Large unexpected waves

Sneaker waves can surge unexpectedly onto rock platforms, posing a risk to snorkellers and shore-walkers.

Low risk: 4WD track access to beach

The vehicle track from Swan Lake campground to the beach requires a 4WD vehicle and may be soft or impassable after rain.

Low risk: Cold water temperatures

Southern Ocean waters can be very cold year-round, even in summer. Wetsuit essential.

Low risk: Lake-to-sea opening hazards

When the lake mouth opens to the sea, shifting currents and submerged debris may be present near the entrance channel.

Low risk: Cold water temperature

Nutrient-rich cold water year-round, especially during the Bonney Upwelling in summer, can cause rapid heat loss.

Low risk: Slippery rock platforms

Basalt rock platforms become treacherous when wet; sturdy footwear with good grip is essential.