The "Baths" at Bar Beach provide a relatively safe swimming area beneath the cliffs. Not resembling traditional ocean baths, it is bordered on the north side by a concrete causeway and roped with buoys on the south.
There are many caves and crevices to explore along the cliff face and an Earthcache a little further north.
Plenty of parking available and stairs down to GZ, no need to get onto the sand or into the bush.