Port de Calshot, Maritime port in Tristan da Cunha, Saint Helena

Calshot Harbour is the only harbour on Tristan da Cunha, opened in 1967 and located in the capital, Edinburgh of the Seven Seas. Its shallow basin and limited dimensions keep ocean-going vessels at anchor offshore, so goods and passengers reach the shore by boat. It is one of only four harbours in the British Overseas Territory of St Helena, Ascension and Tristan da Cunha.

The port was established in 1967 and named after an English village that provided refuge to islanders during a volcanic crisis and evacuation. This connection to a place of safety became part of the harbor's identity.

The harbour is named after the village of Calshot in Hampshire, England, where the islanders were taken in November 1961 after the volcanic eruption on Queen Mary's Peak. Its main export is the Tristan rock lobster, Jasus tristani, a species found only around the island, shipped to markets including the European Union.

Because the harbour is shallow and small, ocean-going ships cannot enter and must anchor offshore; goods and passengers reach the shore by boat. The island has no airport, so everything arrives by sea through this harbour in Edinburgh of the Seven Seas.

Calshot Harbour cannot take ocean-going ships because of its shallow depth and limited size; they anchor offshore and boats ferry goods and passengers in. A plan for a new harbour was dropped in 2014 over its 21 million pound cost, and a full renovation took place in early 2017.