Lummi Island, United States offers 14 beaches perfect for sunbathing, surfing, swimming, and more. Lummi Island is known for The Willows Inn, a renowned destination for farm-to-table dining experiences. The best time to visit Lummi Island is during the summer months of July and August, when the average air temperature is around 70°F (21°C) and the water temperature is approximately 55°F (13°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!