Saint Jean sur Richelieu, Canada offers 1 beach perfect for sunbathing, surfing, swimming, and more. Saint Jean sur Richelieu is known for the International Balloon Festival of Saint-Jean-sur-Richelieu. The best time to travel to Saint Jean sur Richelieu, Canada, is during the summer months of June to August, when the average air temperature is around 70-80°F (21-27°C) and water temperatures in nearby lakes and rivers are comfortable for swimming. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!