Serang, Indonesia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Serang is known for the Great Mosque of Banten and the Banten Grand Palace. The best time to travel to Serang, Indonesia, is from May to September, with average air temperatures around 28°C (82°F) and water temperatures near 29°C (84°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!