Southampton Shoal Light, Maritime navigation station in San Francisco Bay, US

Southampton Shoal Light was a square, two-storey wooden building raised on a platform carried by wooden piers at the southwest edge of Southampton Shoals, northeast of Angel Island. The building was moved away in 1960; what remains on the platform is a pole with an isophase red light (three seconds on, three seconds off) and an automated fog bell that chimes every ten seconds.

Southampton Shoal Lighthouse was built and first lit in 1905, a square wooden building on a platform carried by wooden piers, fitted with a fifth-order Fresnel lens. In 1960 the structure was moved to Tinsley Island, a private island in the San Joaquin River delta near Stockton owned by the St. Francis Yacht Club of San Francisco, and the site was replaced by an automatic beacon. The original lens is on display at the Angel Island Interpretive Center.

The original fifth-order Fresnel lens from the light is displayed at the Angel Island Interpretive Center, where visitors can see it. The lighthouse itself was moved in 1960 to Tinsley Island, a private island in the San Joaquin River delta owned by the St. Francis Yacht Club of San Francisco, and the building now serves as lodging.

The building is privately owned and serves as accommodation for members of the St. Francis Yacht Club. The site is not open to the public, though it can be viewed from boats passing through the bay.

The 1905 fifth-order Fresnel lens from the lighthouse is now on display at the Angel Island Interpretive Center. The light itself was deactivated in 1960, when the building was moved to Tinsley Island, a private island in the San Joaquin River delta owned by the St. Francis Yacht Club.