Opcina Janjina, Croatia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Istria is known for its picturesque coastal towns like Rovinj and Pula, as well as its truffle-rich interior and historic Roman architecture. The best time to travel to Opcina Janjina, Croatia, is from May to 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!