The best month to go to Mykonos is during the summer months of June to August and the autumn months of September to October. Summer is the best time for partying on the island and you can expect crowded planes and ferries. If you want peace, the winter months of November to April are the best time to visit as the weather cools. You can get discounted rates for accommodation. However, the ferries and tourist sites operate on limited hours during these months.