Spencers Island, Canada offers 1 beach perfect for sunbathing, surfing, swimming, and more. Spencers Island is known for the historic lighthouse and the Mary Celeste shipwreck site. The best time to visit Spencers Island, Canada, is during the summer months of June to August, when the average air temperature is around 20°C (68°F) and the water temperature is approximately 12°C (54°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!