Harbour Mouth is located on the south side of Harbor Island and cuts between Eleuthera and Harbour islands from the east via the Atlantic Ocean. Located on the northern end of the island of Eleuthera, Harbour Island itself is one of the most popular destinations in the Bahamas. Known fondly as Briland by many visitors, Harbour Island is filled with shops, markets, boutiques and all manner of provisioning and supply facilities a cruising boater could ask for. The island is quite popular, and during busy in-season weekends, golf carts jam the streets in a Bahamian traffic jam that is quite a spectacle to see.

There are two primary marinas on the island and both are located off the west side side of the central portion of the island. Valentine s Resort and marina is to the north and is the larger of the two, while Harbour Island Club and Marina is to the south. Anchorage is available off both marinas in seven to 10 feet of water.