Rostam Rud, Iran offers 1 beach perfect for sunbathing, surfing, swimming, and more. Rostam Rud, Mazandaran Province, Iran, is known for its proximity to the Caspian Sea and the lush Hyrcanian forests. The best time to travel to Rostam Rud, Iran, is during spring (April to June) when the average air temperature is around 20-25°C (68-77°F) and the Caspian Sea water temperature is approximately 15-20°C (59-68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!