Sainte Agathe des Monts, Canada offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Criccieth is known for Criccieth Castle and its picturesque beaches. The best time to travel to Sainte Agathe des Monts, Canada, is during the summer months of June to August, when the average air temperature is around 20-25°C (68-77°F) and water temperatures in nearby lakes are approximately 20°C (68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!