Riviere Portneuf, Canada offers 1 beach perfect for sunbathing, surfing, swimming, and more. Riviere Portneuf is known for the Portneuf River and the scenic Portneuf Regional Natural Park. The best time to travel to Riviere Portneuf, Canada, is during the summer months of June to August, when the average air temperature is around 20-25°C (68-77°F) and the water temperature is approximately 15-20°C (59-68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!