Re: Where can you surf: not windsurf?
You were probably talking about riding waves--without a sail but on a surfboard? Yes, some of the best surf in the Dominican Republic is between Sosua and Cabarete.
About 5 km west of Cabarete is a great sand point with consistent swells in the winter called "Hidden Beach." It is near a delayed housing construction area. You can camp for the day, week, or just drive in from your hotel for a few hours. The wind usually picks up onshore in the afternoon, so hit it early to mid-morning, but not too early or you'll get the leftover backwash bounce. It's a golden sand beach with clear water and an offshore reef parallel to the shore about 100 meters out, ridable at 1-3 meters.
You can rent surfboards in Cabarete, which is primarily a windsurfing capital. You'll have to constantly clarify that your interest is in surfing, not windsurfing, when asking about breaks or conditions.