Depending on the topography of the land, it could in some areas. But its gotta destroy all the existing beachfront properties first, and the new ones aren't going to last very long either.
Just the other day we were joking that Trump may not understand the difference between an insane asylum and political asylum, which would go a long way towards explaining why he keep asserting that we're exclusively getting migrants from mental institutions. This ocean thing seems pretty similar and on brand for him.