Bisevo, Croatia offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Bisevo is known for the Blue Cave, a stunning natural sea cave that glows with an ethereal blue light. The best time to travel to Bisevo, Croatia, 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!