Saint Prime, Canada offers 1 beach perfect for sunbathing, surfing, swimming, and more. Saint Prime is known for its proximity to Lac Saint-Jean and the Velo Route des Bleuets. The best time to travel to Saint Prime, 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 in nearby Lac Saint-Jean is approximately 70°F (21°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!