Braye Harbour is the main harbour on the north side of the island of Alderney, in the Channel Islands, a dependency of the British Crown. A 3,000 feet (910 m) breakwater was built by the Admiralty to protect the Navy in the 19th century shelters Braye Harbour. The harbour faces out onto the Swinge, which is part of the English Channel, and it is at Braye that most of the island's freight comes in. Braye is more or less a suburb of St Anne, the island capital; the centre of St Anne lies approximately 1 mile from the harbour.

Alderney is the northernmost of the inhabited Channel Islands. It is part of the Bailiwick of Guernsey, a British Crown dependency. It is 3 miles (5 km) long and 1+1⁄2 miles (2.4 km) wide.