Unfortunately, a coastal engineering specialization requires a masters in addition to an undergraduate study usually in civil engineering....I'm a civil and wish I had the patience to go back and obtain my coastal masters....and the other kicker is maybe a dozen schools in the country offer coastal.Coastal geomorphology with an engineering degree/certification is something you might want to look into.
I did my undergrad work at UD and even though I was a hike from the beach it was worth it. I wouldn't let surfing dictate your school choice. It's only 4 years, the degree will give you ample options to live near the beach when you graduate as you are a valuable employee, and frankly you'll have so much to do between drinking, girls, sleeping, drinking, oh and school too! Pick a school based on the social and educational merits and think about the location as a side note. The time will fly by once you're there.