Margaree Harbour, Canada offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Margaree Harbour is known for the Cabot Trail, Cape Breton Highlands National Park, and the Margaree River. The best time to travel to Margaree Harbour, Canada, is from June to September, when the average air temperature is around 15-20°C (59-68°F) and the water temperature is approximately 12-16°C (54-61°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!