Oas, Philippines offers 13 beaches perfect for sunbathing, surfing, swimming, and more. Oas, Bicol, Philippines, is known for the majestic Mount Mayon and its perfect cone shape. The best time to travel to Oas, Philippines, is from December to February, with average air temperatures around 77-86°F (25-30°C) and water temperatures approximately 79-82°F (26-28°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!