Lopud, Croatia offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Lopud is known for its beautiful Sunj Beach and the historic Franciscan Monastery. The best time to travel to Lopud, Croatia, is from late May to early 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!