Port Mouton, Canada offers 1 beach perfect for sunbathing, surfing, swimming, and more. Port Mouton is known for Kejimkujik National Park Seaside and Carter's Beach. The best time to travel to Port Mouton, Canada, is during the summer months of July and August, when the average air temperature is around 20°C (68°F) and the water temperature is approximately 15°C (59°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!