Port San Luis is a harbor on the central coast of California, approximately 1.3 miles (2.1 km) west of Avila Beach in San Luis Obispo County. The harbor is managed by the Port San Luis Harbor District which is responsible for maintaining the surrounding tidelands and beaches. Originally acting as a major port for oil exports, the harbor serves as a recreational area and is used by boaters and researchers to study and appreciate the local marine life.