Saint Vallier, Canada offers 1 beach perfect for sunbathing, surfing, swimming, and more. Saint Vallier is known for the Saint-Vallier-de-Bellechasse Church and its scenic views of the St. Lawrence River. The best time to travel to Saint Vallier, Canada, is during the summer months of June to August, when the average air temperature is around 68°F (20°C) and the water temperature is approximately 64°F (18°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!