What is the current dengue situation in Sri Lanka for travellers?

Dengue is endemic in Sri Lanka, and cases happen year-round, so travellers should take normal mosquito bite precautions no matter when they arrive.

Even though the dengue virus is present across the island all the time, the general threat for short-term travellers who actually use strong mosquito avoidance methods stays low. The Sri Lankan Ministry of Health monitors outbreaks continuously, and these often follow monsoon rains, in a pattern that people notice. Travellers are not being told to cancel their trips, but you really need to focus on prevention, things like using DEET-based repellents, and wearing the right clothing, especially in urban and semi-urban areas where Aedes mosquitoes are thriving.