Gourna, Greece offers 1 beach perfect for sunbathing, surfing, swimming, and more. Gourna, Crete, Greece, is known for its proximity to the ancient archaeological site of Knossos. The best time to travel to Gourna, Greece, 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!