Agia Roumeli, Greece offers 9 beaches perfect for sunbathing, surfing, swimming, and more. Agia Roumeli is known for the Samaria Gorge, a popular hiking destination in Crete, Greece. The best time to travel to Agia Roumeli, Greece, is from May to September, when the average air temperature is around 25-30°C (77-86°F) and the water temperature is approximately 22-26°C (72-79°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!