Injidup Natural Spa is one of the most photographed spots on the Capes coast, but it is a swimming hole rather than a dive site. Perth Is OK describes a rock pool north of Injidup Beach where waves crash over the rocks to form a mini natural waterfall and 'spa', with other tidal pools close by, reached by a short walk over rocky outcrops from a small car park on Wyadup Road. The experience varies with tide, time of day and swell - sometimes tranquil, sometimes turbulent - and the larger pools nearby are less sheltered and dangerous in swell.

The key safety message is to stay in the pools. The article warns that currents and swells are much stronger on this coast and that anyone swimming in the open ocean beyond the pools could easily be swept away; there have been serious accidents involving people jumping from the rocks in the area. The Injidup area is also one of the named sanctuary zones in the Ngari Capes Marine Park.

It is included in this database because it was named in the regional brief and because snorkellers often ask about it. On a calm day the tidal pools hold small fish, crabs and anemones, and a mask adds interest, but there is no scuba diving here. Go early to avoid the summer crowds, and never enter when big sets are breaking over the rocks.

The Capes coast between Cape Naturaliste and Cape Leeuwin faces the Indian Ocean and is famous for its surf, which is exactly what makes diving here so condition-dependent. Long-period south-westerly groundswell can arrive on calm, sunny days, and the regional ocean-safety guide advises observing a site in different conditions before diving it, never diving alone and flying a flag near boat ramps.

From Caves Road between Yallingup and Margaret River take Wyadup Road toward the ocean, keeping right rather than turning onto Cape Clairault Road. Park at the small car park at the trailhead and walk down over rocky outcrops toward the large boulders; the spa is on the rock platform north of Injidup Beach. The nearest full-service dive shop for fills and hire is Swan Dive in Busselton; there is no dedicated dive shop in Margaret River or Augusta, so bring filled cylinders.

The spa effect depends on tide, time of day and swell; it can be tranquil or turbulent. The larger pools nearby are less sheltered and dangerous when the swell is up, and the open ocean beyond the pools has strong currents and swells - do not swim outside the pools. Visit early to avoid crowds.

Not a scuba site: sit or float in the main pool on a small-swell day at mid to low tide; mask-and-snorkel looks in the tidal pools are possible when calm. Snorkellers should stay within easy reach of the exit point and swim with a buddy; scuba divers at these depths need no safety stop but should ascend slowly and surface near the float.

No operator needed - self-guided snorkel. Oceania Experiences runs small-group snorkel tours on the Capes coast; Swan Dive (Busselton) supplies hire gear and fills.