Marshville, Canada offers 1 beach perfect for sunbathing, surfing, swimming, and more. Marshville is known for the scenic Marshville Beach and the nearby Jost Vineyards. The best time to travel to Marshville, Canada, is during the summer months of June to August, when the average air temperature is around 70°F (21°C) and the water temperature is approximately 65°F (18°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!