Every winter Sosua Beach will get some serious waves. The storms end up moving the sand around and exposing some rocky bottom.
The Charamicos end of the beach usually has less exposed rock and is in my view nicer for swimming.
I would not worry too much about the conditions. The waves will be gone soon and it will be back to normal.
What is a shame is that the city of Sosua is hostile towards its own beach. The city makes no effort to improve or make any productive changes.
A simple thing like trash cans would go a long way to help. The mayor and the rest of the city government does nothing.
One day the city will get its wish and a big hotel will take the beach and people will wish for the good old days.