The Portlock Point Lighthouse was constructed on the eastern tip of Prevost Island in 1896, replacing a stake light that had existed there for about five years.

The area around the lighthouse is characterized by rocky bluffs and a coastal Douglas fir ecosystem.  Both the land and waters surrounding the point are also protected and managed by Parks Canada.

The light was automated and de-staffed in 1969.  It can be seen from the Tsawwassen - Swartz Bay ferry.