I have seen 16 foot cresting waves many times on my sailboat. They occur under certain conditions from just south of beavertail to about a line between PJ and Brenton reef then past that they are just big rollers on the open water.
The worst I have experienced recently fishing (that is been washed over by them , not just looking at them) were some rogues coming into central beach one October. Smokey and I were on the big rocks maybe 3 feet above the wash fishing for about 20 minutes when out of nowwhere comes three big waves in a row clear over our heads. We clung to the rocks like cats and immediately beat a retreat to the beach. We watched for a while because that was it , 3 waves and it went back to normal. Luckily we did not go back out on the rocks because about 20 minutes later here comes 3 more just like the first ones that hit us. Something out there was setting up these big suckers about every 20 minute and in between they were normal waves.
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