Saint Quay Portrieux, France offers 7 beaches perfect for sunbathing, surfing, swimming, and more. Saint Quay Portrieux is known for its beautiful beaches, the GR 34 hiking trail, and the annual Scallop Festival. The best time to travel to Saint Quay Portrieux, France, is from June to September, when the average air temperature is around 18-22°C (64-72°F) and the water temperature is approximately 16-19°C (61-66°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!