Isabela, United States offers 11 beaches perfect for sunbathing, surfing, swimming, and more. Isabela is known for its stunning beaches like Jobos Beach and the Guajataca Tunnel. The best time to travel to Isabela, United States, is from December to April, with average air temperatures around 75-85°F and water temperatures about 77-82°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!