Seven miles northeast of Orient Point, where Block Island Sound and Long Island Sound meet. Original structure was a 50 foot stone tower. Present light is 81 feet, 350mm light, granite tower has 19 foot diameter at base, with walls 5 1/2 feet thick.
This is another light whose condition has been allowed to deteriorate. The fact that Plum Island is a restricted area, combined with government bureaucratic concerns, makes the future preservation of this light uncertain. It is reportedly in bad shape, and erosion continues to threaten it. Levels of optimism about the preservation of this light vary greatly among Long Island's "lighthouse people."