Lestes concinnus is a widespread species in tropical Asia and Oceania. It is a species known to have variable colour patterns ranging between pale and dark phenotypes which have earlier been recognized as distinct species. Lestes concinnus has never been known from Sri Lanka before. We report observations of both phenotypes of the species and intermediate morphs of Lestes concinnus from coastal habitats with dry reed patches in the northern part of the country, adding it to the Odonata fauna of Sri Lanka. With multiple field observations examined, we also provide comments on its identification and natural history in the country.