Diving in and around the bay is excellent. Coral is abundant near the cliffsides, where the bottom quickly slopes off to about 40ft. Beyond the bay's western edge, near Puʻu Pehe rock, is Cathedrals, the island's most spectacular dive site, featuring arches and grottoes amid a large lava tube that is 100ft in length.

Trilogy Lanaʻi Ocean Sports runs diving and snorkeling trips in the area.