Because of a big swell it was hard to enter the water and there wasn't much to see. The park has a lava shoreline at its east side that can be fun to explore, as it's pocketed with tiny inlets harboring black crabs and bright tropical fish. There are restrooms, showers and picnic tables, and a lifeguard is on duty daily. There's not much to see from the pebbly beach. A few little fish, crabs of course, hermit crabs and sea weed.
Visibility is pour.
You can better spend your time watching the dolphins and seals who come to hunt in the strong current around Chanonry Point when the tide changes. Same bay as Port Henderson but on the other side. At the beginning of the beach is a rocky outcrop. You can enter the water from the beach and snorkel around the rocks. There isn't much to see though.