Port Nelson, Canada offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Port Nelson, Nunavut, Canada, is known for its proximity to the Thelon Wildlife Sanctuary and the Northern Lights. The best time to travel to Port Nelson, Canada, is during the summer months of June to August, when the average air temperature is around 15°C (59°F) and the water temperature is approximately 10°C (50°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!