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The water temperature in the Canary Islands ranges from 18°C (64°F) in winter to 24°C (75°F) in summer. A wetsuit is included and recommended year-round.

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Diving & Snorkeling in Hang Cau

Hang Cau, Lý Sơn

⏱ 20 minutes

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About this experience

Hang Cau is a sea cave diving and snorkeling site on the western coast of Lý Sơn Island, Quảng Ngãi Province. The site features a collapsed volcanic cave opening into a turquoise lagoon, with coral reefs and tropical fish visible at depths of 3 to 8 metres. Access is by local boat from Lý Sơn's main harbour, with calm conditions from April to August.

What to expect

Boat transfer from Lý Sơn harbour takes 20 minutes, with the trip including a guided snorkel session of 45 minutes inside the cave lagoon.
The dive site reaches a maximum depth of 8 metres, suitable for beginners and certified divers alike, with visibility typically 10 to 15 metres.
You will see hard coral formations, anemonefish, parrotfish, and occasional sea turtles near the cave entrance.
A certified dive instructor accompanies every group, and all snorkel masks, fins, and buoyancy vests are provided.
The tour includes a 30-minute surface interval with fresh water and fruit on the boat, plus a safety briefing before entry.
The site suits families with children aged 8 and above, as the lagoon is sheltered from open-sea currents.