RedactedNarrative: Vessel was entering harbor in the dark.  Sea state was 3-4 ft and 15-20 kt winds.  The entrance of the harbor is only marked with a navigational beacon on the starboard side as you enter from sea.  The port side of the entrance which is a rock jetty breakwater is not illuminated.  The sailboat went around the starboard side navigational beacon however he overshot the entrance and struck the port side jetty breakwater.  The sailboat got pushed via the winds onto the the jetty and becomes lodged.  The seas continue to strike the sailboat and it was eventually completely debilitated.  The parties on board exit the sailboat and walk to a nearby hotel for the night.