Cilacap, Indonesia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Dunure is known for Dunure Castle and its scenic harbor along the Ayrshire coast. The best time to travel to Cilacap, 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!