Worst time to visit Sri Lanka?

Sri Lanka really does not have such a definite worst time. The island experiences two monsoon seasons, which means that different areas catch rain at different times of the year.

From May through to September, the southwest coast and hill country get more rain, while the east coast remains sunny and perfect for traveling. From October till January, the northeast monsoon carries rain to the east while the south and west settle with much better weather.

Thus, Sri Lanka can be visited all year round, provided a particular region is visited at the right time.