Lustica, Montenegro offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Lustica, Herceg Novi, Montenegro, is known for the Lustica Bay resort and the Blue Cave. The best time to travel to Lustica, Montenegro, is from June to September, when the average air temperature is around 25°C (77°F) and the sea temperature is approximately 24°C (75°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!