Illa de Ons (Atlantic Islands National Park)
Ons lies at the entrance of the Ría de Pontevedra, belongs to the municipality of Bueu and is part of the same national park as the Cíes. Galicia's tourist board describes it as less visited than Cíes, with similar marine life and a large number of species. Centres in Aldán and Portonovo offer dives on the island, with sites, wrecks and rocky reefs around its rocky shelf. Position estimated from the nearest coast or published location text, for orientation only.
Facts
- Region: Spain – Atlantic North (Galicia, Asturias, Cantabria, Basque Country)
- Area: Galicia
- Level: intermediate
- Current: moderate
- Type: reef, shore
- Coordinates: 42.381, -8.918 (approximate)
- Highlights: less crowded than Cíes, rocky shelf with rich shallow seabed, national park – written diving authorisation needed
- Permit: Written authorisation is required to dive in the national park's waters (Law 15/2002, as cited by the official procedure page); request it through the park's website. Visitor numbers to the islands are limited and need advance authorisation from the Galician Government. Confirm the current procedure with the park.
- Issuer / contact: Parque Nacional das Illas Atlánticas de Galicia (Xunta de Galicia) – diving authorisation; procedure page hosted by Concello de Vigo
- Phone: 010 / 986 810 100 (Concello de Vigo e-administration helpline, not the park)
- Website: https://illasatlanticas.gal/
- Tips: The same park diving authorisation as for Cíes applies; ferries run from Bueu, Portonovo, Sanxenxo, Marín and Aldán. Named dive sites around Ons were not available from sources we could open – ask the centre.