Roche Harbor is a sheltered harbor on the northwest side of San Juan Island in San Juan County, Washington, United States, and the site of a resort of the same name. Roche Harbor sits along Haro Strait and Canada–United States border. The harbor itself provides one of the better protected anchorages in the islands. The harbor is surrounded on the east side by San Juan Island, on the north side by Pearl Island, and on the west and south sides by Henry Island. Most of the harbor is 35 to 45 feet (11 to 14 meters) deep. Roche Harbor has a small airport used primarily by local residents.