Roche Harbor, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Roche Harbor is known for its historic Hotel de Haro, the San Juan Islands Sculpture Park, and the Roche Harbor Marina. The best time to travel to Roche Harbor is during the summer months of June to August, when the average air temperature is around 70°F (21°C) and the water temperature is approximately 50°F (10°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!