Area D Graham Island, Canada offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Area D Graham Island, British Columbia, Canada, is known for Gwaii Haanas National Park Reserve and Haida Heritage Site. The best time to travel to Graham Island, Canada, is from June to August, with average air temperatures around 15-20°C (59-68°F) and water temperatures around 10-12°C (50-54°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!