The best time to visit Greece is during the shoulder seasons of spring (April to early June) and fall (September to October). During these months, the weather is pleasant, and tourist crowds are thinner compared to the peak summer season. This period is ideal for exploring archaeological sites, island hopping, and enjoying the beaches. The high season, from late June to August, offers the quintessential sunny Greek vacation but comes with higher prices and more tourists. Winters can be cool and some island services are reduced, but it's a great time to visit cultural sites in cities like Athens and Thessaloniki without the crowds.