Plage des Rosaires, Coastal beach in Plérin, Brittany, France

Plage des Rosaires is a beach at the mouth of the Gouët estuary in Plérin, Côtes-d'Armor, facing the bay of Saint-Brieuc. It forms a two-kilometre arc of sand backed by a seafront promenade, with the sea withdrawing several hundred metres at low tide to expose flat sand and shallow pools.

Plage des Rosaires lies on the northern coast of Brittany, about 400 km west of Paris, in the commune of Plérin near Saint-Brieuc. The sources record only its coastal setting and a temperate climate with about 11 °C average temperature and roughly 1,082 mm of rain a year; no founding date or fishing history is documented.

The beach takes its name from the nearby Rosaires area of Plérin, and its Breton name is Aod ar Rozaer. The wide sands exposed at low tide are used for shore fishing and family outings, and the bay is sheltered enough for swimming in summer.

The beach has supervised swimming zones and wheelchair accessibility with specialized beach equipment for mobility. Public transport from Saint-Brieuc reaches this area during the summer season.

The beach faces north into the Bay of Saint-Brieuc, roughly 400 km west of Paris, and the Côtes-d'Armor climate here is mild and wet, with February averaging about 2 °C and June about 19 °C. Annual rainfall reaches around 1,082 mm, so the sand is often damp even in summer.