The best time to visit Perissa is during the shoulder seasons of May, early June, September, and early October.These months offer pleasant weather, with warm temperatures superb for beach activities and exploring, without the intense heat and larger crowds of the peak summer months. You'll find the sea is warm enough for swimming, and most businesses are fully operational.For those looking to enjoy the beach and water sports without interruption, late June to August is also a good option, though it is the busiest and hottest period. During this time, the beach stretches along the Aegean Sea, offering plenty of sun loungers and water sports facilities like paddleboarding and jet skiing. The promenade behind the beach, lined with tavernas and cafes, is particularly lively in the evenings.If you're interested in hiking or exploring the island's archaeological sites like Ancient Thera, the cooler temperatures of May and October are ideal.