Petalioi Gulf, Greece offers 1 beach perfect for sunbathing, surfing, swimming, and more. Petalioi Gulf is known for its picturesque islands and the luxurious retreats frequented by celebrities. The best time to travel to Petalioi Gulf, Greece, is from June to September, when the average air temperature is around 77°F (25°C) and the water temperature is approximately 75°F (24°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!