Mirista, Montenegro offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Mirista, Herceg Novi, Montenegro, is known for the Blue Cave, a stunning natural sea cave that attracts tourists for its vibrant blue waters and unique kayaking and boat tours. The best time to travel to Mirista, Montenegro, is from June to September, with average air temperatures around 25°C (77°F) and water temperatures about 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!