Santa Rosa Island, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Santa Rosa Island is known for Channel Islands National Park, Torrey Pines, and its unique wildlife. The best time to visit Santa Rosa Island is from late spring to early fall, with average air temperatures ranging from 60-75°F and water temperatures around 60-70°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!