China Diving Tourism Guide — Explore Underwater Wonders from Hainan Coral Reefs to Ancient Lake Ruins

Located at the magical 18°N latitude, Wuzhizhou Island is a heart-shaped tropical paradise widely celebrated as the "Maldives of China." Sea visibility reaches an extraordinary 6–27 meters, and surrounding waters host over 300 species of reef fish and vibrant coral gardens. The island features internationally advanced diving equipment and multiple certified operators. Signature dive sites include "Back Garden" and "Glassfish Planet," and divers can even participate in hands-on coral transplantation — a unique eco-tourism experience blending adventure with marine conservation.

Fenjiezhou Island is home to a PADI 5-Star Dive Resort — the highest rating in the PADI system — making it one of the most professionally run dive operations in China. The waters here are clear and blue, preserving Hainan's original wild beauty. The island offers experiences ranging from beginner snorkeling (¥198–210) to full PADI Open Water + Advanced Open Water certification courses (¥6,000, 5 days with accommodation). It also features a semi-submarine tour (¥178–342) for non-divers and a popular Ocean Theater. This is the ideal destination for travelers who want to combine leisure diving with professional certification.

Hailed as the "Diving Paradise of China," Yalong Bay offers water visibility of 8–16 meters and warm tropical waters year-round. The bay hosts an PADI Dive Resort at the Aegean Sea area (¥360–468 per dive), making it a convenient option for hotel-based divers staying in Sanya's premier resort area. Marine life includes butterfly fish, clownfish, and angelfish among healthy coral formations. The bay's calm conditions make it particularly suitable for first-time divers and snorkeling enthusiasts.

Xidao Island sits within a national coral reef reserve, offering some of the clearest waters closest to Sanya city center (14.7km). The island is ideal for SUP paddleboarding, kayaking, and snorkeling, with dive experiences starting at ¥238–278. It scored 4.6/5 on major travel platforms and was named one of Asia's "100 Must-Visit Spots" in 2026. The island's proximity to Sanya makes it perfect for a half-day dive excursion combined with other water sports.

China's youngest volcanic island offers a diving experience like no other — volcanic underwater terrain formed by ancient lava flows creates dramatic seascapes perfect for macro photography. The South Bay Marine Sports Park offers SDI-certified diving experiences (¥298–378) and depth diving with photography packages. With healthy coral coverage and abundant macro life including nudibranchs, seahorses, and juvenile fish, Weizhou Island is a rising star for underwater photographers. The island itself is a national volcanic geological park, offering dramatic topside scenery including Crocodile Mountain, Five-Color Beach, and the S-shaped coastline. Water temperatures are warm enough for 3mm wetsuits year-round, and visibility reaches 10–20m during peak season.

Qiandao Lake offers what may be the most unique freshwater dive on Earth — the underwater ruins of He Cheng, an ancient city dating back over 600 years to the Ming Dynasty. Submerged in 1959 when the valley was flooded to create a reservoir, the city remains remarkably well-preserved at depths of 20–40m. Divers can explore ancestral halls with intricate wood carvings, the House of Xin with stone carvings on door plaques, and the Jiexiao Archway — a Ming Dynasty chastity archway. The PADI 5-Star Instructor Development Center (Big Blue) operates here, offering bilingual (English/Chinese) services and strictly limiting groups to 2 divers per guide. Requirements include Advanced Open Water certification and 20+ logged dives, plus passing a check dive to demonstrate buoyancy control. This is a once-in-a-lifetime dive that combines history, archaeology, and technical diving.

For divers seeking something completely different from tropical reefs, Dalian offers cold-water diving through towering kelp forests — an ethereal underwater landscape rarely found elsewhere in Asia. The temperate waters here support unique marine life including sea urchins, scallops, flatfish, and cold-water nudibranchs. Underwater topography features dramatic rock formations and walls. Diving requires a 5–7mm wetsuit or drysuit depending on season. Water temperatures range from 8°C in winter to 22°C in summer. This destination appeals to experienced divers and underwater photographers looking for subjects they cannot find in tropical waters. Visibility is best from June to September.

Hong Kong's waters are surprisingly rich in marine life, with active marine conservation projects, shipwreck dives, and thriving macro photography opportunities. Notable dive areas include Sharp Island (coral communities), Hoi Ha Wan Marine Park (protected reef), and various artificial reefs and wrecks. Hong Kong's dive community is well-organized with multiple PADI centers, and the city offers the easiest logistics for international visitors — no domestic flights needed, world-class infrastructure, and 240-hour transit visa exemption. Visibility varies significantly (2–10m) but improves during late summer and autumn. The city is particularly known for its marine conservation diving programs, where volunteers participate in coral monitoring and reef restoration.

The Xisha Islands represent China's most pristine and untouched coral reef ecosystems. Far from coastal development and pollution, these remote atolls feature crystal-clear waters with visibility often exceeding 30m, pristine coral gardens, and abundant pelagic life including reef sharks, manta rays, and large schools of trevally. Access is restricted and requires special permits — typically organized through liveaboard charters departing from Sanya or Qinglan. Expeditions usually last 5–7 days and are limited to advanced divers with significant experience. This is the closest China comes to a world-class liveaboard diving destination, and it remains one of the least-explored reef systems in the entire Indo-Pacific region.

Nan'ao Island is an emerging diving destination in Guangdong Province, home to some of China's northernmost coral communities. The island's waters feature surprisingly healthy coral coverage and tropical fish species at the edge of their natural range. While infrastructure is still developing compared to Hainan, Nan'ao offers a less crowded, more authentic experience for divers willing to explore beyond the established circuit. The island is accessible by bridge from Shantou, making it one of the easiest dive destinations to reach from major cities like Shenzhen and Guangzhou. Best diving is from May to October when water temperatures reach 24°C and visibility improves to 8–15m.