praia da samanguaiá is a small beach, about 300 meters long, directly connected to praia do preventório - samanguaiá is the name of a mollusk found in this area.

together with the adjacent praia praia do preventório, this beach is often referred to as 'praia da areia grossa', or beach of the rough sand.

located in niterói, in the guanabara bay, this beach enjoys calm waters that are typical for the bay, perfect for sailing, kayaking, and windsurfing.