Plage Les Montilles (also known as South Beach or beach of the Côte Vermeille) is a nudist beach located in Port-la-Nouvelle; a coastal town in the Aude region of Occitania.

Plage Les Montilles extends from Place Paul Gauguin near the lifeguard station n°3 to Coussoules Beach in Leucate. Plage Les Montilles has been given official naturist beach status since May 30, 2001.

There are two areas that make up the beach. The first is in the centre of Port la Nouvelle. This is a family orientated area. As soon as you leave this area towards the south, the beach becomes a naturist beach.