Sulina, Romania offers 1 beach perfect for sunbathing, surfing, swimming, and more. Sulina, Tulcea County, Romania, is known for the Danube Delta, the Sulina Lighthouse, and the Sulina Beach. The best time to travel to Sulina, Romania, is from June to August, when the average air temperature is around 25°C (77°F) and the water temperature is approximately 22°C (72°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!