Grad Trogir, Croatia offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Grad Trogir is known for its UNESCO World Heritage Site, the historic Trogir Old Town. The best time to travel to Grad Trogir, Croatia, is from May to September, when the average air temperature is around 75°F (24°C) and the water temperature is approximately 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!