The national park occupies the Coffin Bay Peninsula - a long peninsula with a sheltered bay to its north, coastal dunes, swamps and a coastline which overlooks islands, reefs, limestone cliffs and white surf beaches.

Access to the majority of the park's area north of Yangie Bay is via four wheel drive tracks only.

The historic former Coffin Bay Whaling Site at Point Sir Isaac lies within the national park and is listed on the South Australian Heritage Register.

The volunteer organisation Friends of Coffin Bay Parks have worked to re-introduce native plants and eradicate feral animals and weeds.

This particular IBA supports over 1% of the world populations of pied and sooty oystercatchers, as well as significant numbers of fairy terns, hooded plovers, western whipbirds, rock parrots and blue-breasted fairy-wrens.