The growth and importance of the port in Marín was demonstrated as early as the 18th century thanks to the Oseira monastery, which opened it up to fishing and foreign trade.

In 1868, Marín became a first-class maritime district in Spain and benefited from the services of many European and South American consulates due to the important commercial and migratory movement.

[6] The port has, among other facilities, a modern, air-conditioned Fish Auction Hall, a covered terminal, an internal rail network, a border inspection post and two Shipyards.

The most commonly imported goods are fruit,[8] Cereals, paper pulp, frozen fish or steel products.

The port is connected to the Pontevedra ring road, allowing easy access to the rest of the country, including the AP-9 motorway (A Coruña-Tui).

The PO-11 is an urban motorway of approximately 4 km that connects the AP-9 and the PO-10 (Pontevedra's southern bypass) to the Port of Marín in the southwest of the city.

The railway in the service area of the Port of Marín is connected to the national network via the main station in Pontevedra, allowing the transport of goods through RENFE.