Go to any sand beach anywhere in the world. No matter which direction the beach faces, no matter the direction of wind and tide; waves always come in the direction offshore to onshore. Even on the lee side of an island, waves still come ashore and break on the beach. Waves may be bigger on some sides of the island, but I speak of direction, not magnitude. All around the perimiter of a convex island, or all arond the interior perimeter of a bay, waves come ashore approximately parallel to the shore. There must be a physical reason for this that escapes me at the moment.