When visiting Sri Lanka, pack light cotton clothing to stay comfortable in the tropical climate. Sunscreen and a hat are essential for sun protection, while a light rain jacket will be handy during the monsoon seasons. The hill country can be cooler, so a sweater might be necessary for the evenings. The best times to visit vary by region: the west and south coasts are perfect from December to March, while the east coast shines from April to September. Always check the local weather forecast to plan your activities accordingly.