Arnes, Canada offers 1 beach perfect for sunbathing, surfing, swimming, and more. Arnes, Manitoba, Canada, is known for the Arnes Farmers Market. The best time to travel to Arnes, 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 in Lake Winnipeg 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!