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

located in niterói, in the guanabara bay, this beach has the typically calm waters of the bay, perfect for sailing, kayaking, and windsurfing.

one of the most famous yacht clubs in guanabara bay, the clube naval charitas, is located on the far end of this beach.