Don't try the road with a normal car! It's a horrible road full of holes and rocks. We drove from Sigri, and it took more than an hour (google showing 16 min!)
If you manage to get there, the beach is amazing! It's a long sandy beach, crystal clear water, and beautiful scenery. The entrance to the sea is smooth, and the sea bed is soft sand. There was no one on the beach, but footprints suggest people pass there. A river enters the sea on the right side, but the beach is so huge that you can't get annoyed with it.
If you manage to go to this beach then you are a superhero. It is located half way from Eressos to Sigri. The Google map is pretty accurate, so you can trust the navigation. Be prepared though, the dirt road is quite bad. There is a custom gate about 200m before the beach, you can open it and go through it with your car. The overall experience from beach is rewarding. Check out the photos.