Merdari, Montenegro offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Herceg Novi is known for the historic Forte Mare fortress and the annual Mimosa Festival. The best time to travel to Merdari, Montenegro, is from June to September, when the average air temperature is around 25°C (77°F) and the water temperature is approximately 23°C (73°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!