Point Blunt Light, Maritime navigation point in San Francisco Bay, California, US

Point Blunt Light is a one-storey white concrete building on the southwest side of Angel Island, at the end of Point Blunt. It houses the foghorn, which sounds every 15 seconds, and the light on its roof shows a long green flash every 5 seconds at a focal height of 18 m. The site is reachable only by boat.

Point Blunt Light was established in 1915 as a small wooden fog-signal hut on a platform at the tip of Point Blunt, with the light mounted on its roof. It was tended by keepers from the Point Knox light station until 1960, when a new watch room was built at Point Blunt. A white concrete fog-signal building followed, and personnel moved there in 1961. The station was automated in 1976.

The station's watch room, finished in 1960, gave its crew a view over the whole of San Francisco Bay. Crews moved here from the Point Knox light station in 1961, and the light was automated in 1976. Four three-bedroom family units housed the personnel, two Coast Guard-owned and two leased from the State of California.

The light flashes every five seconds to guide vessels through the bay, and the station has been fully automated since 1976. The site sits on an island, so visitor access is restricted, though the structure is visible from outside Angel Island.

The station included four separate residential units with three bedrooms each, built to house Coast Guard personnel who operated direction finder calibration services. This setup reflects how critical the location was for supporting advanced navigation technologies beyond basic lighthouse operations.