Sisan, Croatia offers 6 beaches perfect for sunbathing, surfing, swimming, and more. Sisan is known for its proximity to the Brijuni National Park and the ancient Roman amphitheater in nearby Pula. The best time to travel to Sisan, Croatia, is from June to September, with average air temperatures around 75°F (24°C) and water temperatures around 73°F (23°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!