The best period for visiting Corsica is between May and September. The weather is sunny and warm and the water is pleasant until September. If you are going walking, you will appreciate the months of May, June and September: it's not too hot and the island is less crowded. Travellers who want to swim and enjoy the warm water will prefer the months of July and August. You can also go there in April or October, which are pleasant months for a visit. The only time to avoid is between November and March when the island isn't very lively.