Flagstaff is a shallow shore-accessed bay dive at Swansea Heads, with a sandy bottom, rocky edges, and a protected entry that works from the beach or over the rocks. It is a classic local shark dive in winter, but the site also gives you year-round reef life and enough structure for a relaxed scenic loop. Plan for a shallow profile, a potentially rocky high-tide entry, and a site that can feel busy when the grey nurse sharks are in.