Located in the Gulf of Tonkin, east of mainland Quang Ninh, Co To Island is an appealing destination for travellers seeking a blend of beach relaxation, coastal exploration and local island life. The wider Co To archipelago comprises numerous islands and islets, with the main inhabited island serving as the primary base for accommodation, dining and excursions. Compared with more developed coastal resorts, Co To retains a laid-back atmosphere shaped by fishing, maritime traditions and its natural surroundings.

The island’s beaches are among its main attractions. Hong Van Beach is known for its gentle shoreline and calm-looking waters in favourable conditions, making it a popular place to relax by the sea. Van Chay Beach offers a more open coastal setting, with waves and broad sandy stretches that appeal to visitors who enjoy walking along the shore. Swimming conditions vary with the weather and currents, so visitors should follow local safety advice.

For a different perspective on the island, Cau My Rock Formation features layered coastal rocks shaped by erosion, creating striking textures and viewpoints over the sea. The area is particularly attractive for photography, especially when the changing light highlights the rock surfaces and surrounding coastline. Co To Lighthouse, situated on elevated terrain, is another notable landmark associated with panoramic views of the island and the Gulf of Tonkin; access to the lighthouse itself may be restricted, so visitors should check local arrangements.

Co To also offers opportunities to explore beyond the beach. Travellers can ride along quiet coastal roads, visit small fishing communities, discover nearby islands by boat when conditions permit, or enjoy fresh seafood at local restaurants. Regional dishes often feature squid, prawns, crabs, clams and fish, reflecting the island’s strong connection to the sea.

The best time to visit is generally from April to June, when conditions are often favourable for beach activities and island sightseeing. July to September can bring hotter weather, heavy rain and tropical storms, which may disrupt ferry services. Autumn can offer pleasant scenery, but sea conditions remain variable. As Co To is reached by boat from the mainland, it is wise to allow flexibility in the itinerary in case of ferry delays or cancellations.