Port Sanilac Light placement and the unique shape were dictated by and created because of budgetary constraints (Congress appropriated only half the money requested). Designed by Eleventh District Engineer Captain Charles E. L. B. Davis, the design has been called "both unique and architecturally significant in its elegance." The tower is white with a red roof. This "handsome" lighthouse shares its design with only one other, Ile Aux Galets, also known as Skilligallee Island Light, on Lake Michigan. The Port Sanilac Light tower is capped with a cast iron lantern room, which still houses a fourth order Fresnel lens manufactured by Barbier and
Port Washington Breakwater Light lens was retained. As with its predecessor, no provision was made to house the fog signal's keepers, and they continued to live in the old keeper's dwelling in town. Funds for the light were appropriated in 1934 and first light came the following year. Full automation came late to this light. The old lens and its lantern were removed at an undetermined date, but keepers continued to operate the fog signal manually until 1975. The light continues in use, with a second but much shorter tower standing on the southern breakwater to mark the other side of the entrance. Port