Semarang, Indonesia offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Semarang is known for its blend of historical architecture and nearby coastal attractions. The best time to travel to Semarang, Indonesia, is during the dry season from May to September, when the average air temperature is around 28°C (82°F) and the water temperature is approximately 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!