Lopar, Croatia offers 44 beaches perfect for sunbathing, surfing, swimming, and more. Lopar, Primorje Gorski Kotar, Croatia, is known for its stunning Rajska Plaza (Paradise Beach) and the nearby Geopark Rab. The best time to travel to Lopar, Croatia, is from June to September, when the average air temperature is around 25°C (77°F) and the sea 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!