The Colachel International Seaport also known as Kanyakumari Transshipment Port, is proposed and located in Colachel, Kanyakumari district, Tamil Nadu, India into a major port transforming it into India's southern trans-shipment gateway.

Tamil Nadu, as early as the 3rd century BCE, had more than 16 such ports — between Chennai and Tirunelveli — that helped it maintain direct maritime links with China and Southeast Asian countries.

Colachel was the location of the battle between the Travancore (Anglicised form of Thiruvithaamkoor) forces led by King Marthanda Varma (1729–1758) and the Dutch East India Company forces led by Admiral Eustachius De Lannoy on 10 August 1741.

D'lennoy went on to serve Marthanda Varma for the next two decades and was promoted to the post of the Valiya kappithan (Senior Admiral) of the Travancore Kingdom.

Large container ships called mother vessels need about 18 metres of water depth.