Sea Cave

a small sea cave with ocean waves crashing against the entrance
Sea cave on San Nicolas Island. ©Steve Schwartz.
A sea cave is a kind of cave formed by the motion of ocean waves. The pounding of the waves against island or mainland cliffs erodes and cuts into a weak area of the rock, forming a cave.

Some of the largest sea caves in the world are found along the Channel Islands, including Santa Cruz Island’s Painted Cave.

Last updated: November 15, 2018