Montreuil-sur-Mer is a railway station on the line from Arras to ÃÂtaples via Saint-Pol-sur-Ternoise. It is located in the commune of Montreuil-sur-Mer in the Pas-de-Calais department, France. The station is served by TER Hauts-de-France trains between ÃÂtaples-Le Touquet and Arras via Saint-Pol-sur-Ternoise.