Argopeni, Indonesia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Argopeni, Central Java, Indonesia, is known for its proximity to the Dieng Plateau, a popular tourist destination featuring ancient Hindu temples and stunning volcanic landscapes. The best time to travel to Argopeni, Indonesia, is from May to September, with average air temperatures around 27°C (81°F) and water temperatures near 28°C (82°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!