The Kantale Dam (Sinhala: කන්තලේ වැව, romanized: Kantaḷe Wewa, Tamil: கந்தளாய் அணை, romanized: Kantaḷāy Aṇai) is a large embankment dam built in Kantale, Trincomalee District, Sri Lanka.

The dam impounds the Per Aru, a small river discharging into the Koddiyar Bay, at Trincomalee Harbour.

The reservoir has a catchment area of 216 km2 (83 sq mi) and a capacity of 135 million cubic metres (4.8×109 cu ft).

[3] On 20 April 1986 (1986-04-20) at 03:00 AM, the dam breached, sending a wall of water over the villages downstream.

The floods killed approximately 120–180 people, destroyed over 1,600 houses and 2,000 acres (810 ha) of paddy, affecting over 8,000 families.