There are two main companies with tickets to Cies: Mar de Ons and Piratas de Nabia. These boats take you to Monteagudo and Faro islands only (they are connected by a bridge.)
How do you get to Cies Island?
The only way to access the Cíes is by sea. In summer and Easter, there are several shipping companies based in the port of Vigo that carry out daily boat tours to the Cíes. These ferries will take you straight to the islands of Monte Agudo and O Faro.
Where are the Cies Islands?
The Cíes Islands (Galician: Illas Cíes; Spanish: Islas Cíes) are an archipelago off the coast of Pontevedra in Galicia, Spain, in the mouth of the Ria de Vigo. They belong to the parish of San Francisco de Afora, in the municipality of Vigo.
Can you stay on the Cies Islands?
Cíes Islands is a natural park with no Hotels or apartments to rent. There is only a camping with limited seats. Otherwise, you can only stay for the day. ... The stay at the camping at Cies Islands is limited to 15 days in a row.