Sri Lanka is the tropical country with almost the same season all year long except for monsoon seasons kicking off at different times during the year despite showers and warm sunny climate is always guaranted.
Light weight and light colors clothing is recommended. It is a good idea to be conservatively dressed on the streets and shorts are not permitted in places of worship. Footwear and hats, Caps off in Temples. A light sweater is recommended in the hill country.