Years ago I remember one ocean opening that occurred on one the largest tidal exchanges of the year. Only time I known of that we turned around and came back in. I remember talking to my bother in law's dad who was a commercial fisherman in the area. He laughed when he heard we attempted to go out. Seems all the commercial guys stayed in, knowing it would be too rough. He stated he had heard of a couple of boats that had to be rescued that day, including one that got slammed so hard with a wave that it crushed the windshield and swamped the boat. I have no doubt that they know exactly what they are doing.