Mercier, Canada offers 1 beach perfect for sunbathing, surfing, swimming, and more. Mercier is known for its proximity to the Parc des Iles-de-Saint-Timothee, a popular destination for outdoor activities and nature enthusiasts. The best time to travel to Mercier, Canada, is during the summer months of June to August, when the average air temperature is around 70°F (21°C) and water temperature is approximately 68°F (20°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!