The best time to go to Vartholomio is from late spring to early autumn, specifically from May to October, when the weather is warm and sunny, great for enjoying the outdoors.May and June offer pleasant temperatures, typically in the low to mid-20s Celsius, making it ideal for exploring the region's historical sites without the intense heat of mid-summer. The landscapes are also very green during this period.For those who love swimming and sunbathing, July and August are the warmest months, with temperatures often reaching the high 20s or low 30s. This is peak season for beach activities along the Ionian Sea coast.September and October provide a lovely balance, with the sea still warm enough for swimming but the air temperatures becoming milder, usually in the mid-20s.