There are glass bottom boat tours from the gulch. they also go out to the marine reserve when the weather is right.
Dive
There are a couple of sites for snorkling and scuba around the rocks and beaches. there is a large marine reserve on the far side of the gulch.
Swim
The weather can be mild during summer, but the water is cold. a short dip can be fine, but most locals wear wetsuits to swim or surf.
Diamond Island
Lies just off the coast, and its possible to walk there through shallow water at low tide, or take a surf ski. careful of currents and tides. the island has clear rock pools, and is a penguin sanctuary.