The best time to visit Sri Lanka is in the dry season, which runs from December to March on the west and south coasts and in the mountains, and from May to September on the east coast. The rest of the year, it's monsoon weather, which makes travelling less pleasant. In Sri Lanka, you'll be enchanted by the many treasures from the ancient kingdom of Ceylan: with ancient cities, amazing beaches and the most beautiful mountains, the Sri Lankan environment is breathtaking.