Siki, Greece offers 1 beach perfect for sunbathing, surfing, swimming, and more. Siki is known for its beautiful beaches and scenic coastal landscapes in Thessaly, Greece. The best time to travel to Siki, Greece, is during late spring to early autumn (May to September), when the average air temperature ranges from 20°C to 30°C (68°F to 86°F) and the water temperature is typically between 20°C and 25°C (68°F to 77°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!