Diving in Apo Reef

Apo Reef sits alone in the Mindoro Strait, 30 to 35 kilometres west of Sablayan, and it is the Philippine national park you can dive and be back from the same evening. There is nothing on it but three low islands, a ranger station, a lighthouse and a campsite. No resort, no shop, no dive centre.

What you cross for is sharks. Whitetip reef sharks are the routine sighting here, not the lucky one, which is rare enough on a Philippine reef that divers who have been repeatedly bring it up unprompted. Grey reef and blacktip sharks come in deeper water, hammerheads occasionally, and the shark population elsewhere in the country has been fished hard enough that seeing several in a day reads as an event.

The park is a submerged platform of about 34 square kilometres, a northern and a southern reef split by a channel running east to west and opening on the western side, from 1.8 metres down to 30 on fine white sand1. Three islands break the surface. Apo Island is the biggest at 22 hectares, with mangrove forest, a shallow lagoon, a boardwalk and the lighthouse; Apo Menor, also called Binangaan, is rocky limestone; Cayos del Bajo is a couple of hundred square metres of bare coralline rock. Whale sharks and short-finned pilot whales are reported in the channel between the first two2.

The dives that come up again and again in divers' own accounts are Shark Ridge off Cayos del Bajo at the north end, Ego Wall on the west side of Apo Island, Aladin on its east side, and the corner on its southeast. Profiles on the dive maps in circulation reach 40 metres. Real logged depths sit higher: nine dives across six sites in May 2025 topped out between 17 and 30 metres, which is the honest band for a recreational day here.

Divers are more divided about the reef than the trip pages are. One who took it as a stop on a Coron liveaboard called it nice but not worth losing a dive day, and another thought it overrated and the park fee a rip-off. A couple diving the Coral Triangle for hard coral in May 2025 rated the south end better than they had expected. Both verdicts survive contact with the place. Coral cover runs to 63 genera, about half the genera recorded worldwide, alongside 481 fish species2. Mantas are reported and are not reliable, and the species behind those sightings has never been identified, so plan the trip around the sharks.

Apo Reef went onto the UNESCO World Heritage Tentative List on 16 May 2006 and has never been inscribed, so it is not a World Heritage Site whatever a booking page says. The nomination is also where the line about the second largest contiguous coral reef in the world comes from1. In Philippine law the reef has been a Protected Area under the Natural Park category since a proclamation of 6 September 1996, and the Expanded NIPAS Act of 2018 made it one of 113 protected areas written into statute2.

Sablayan is the access town, and reaching Sablayan is the part that costs a day. Fly Manila to San Jose in about 45 minutes and ride three hours north, or take the Batangas ferry to Abra de Ilog and ride three hours south. Puerto Galera centres sell the whole thing as a package with five or six hours of transfer at each end. From the town the bangka crossing takes two and a half to three hours out, often less coming back.

Once there you have a choice of trip shape, not of dive site. Day boats run. The budget standard is two or three days sleeping in tents, on the island or on the boat's top deck, because camping in the park is permitted. Liveaboards working the route between Busuanga and Puerto Galera or Anilao call in for a day. Coron looks close on a map and is not a way in.

Every visitor registers at the Sablayan Tourism Office on arrival, under the town's 2021 eco-tour ordinance3. Park fees are collected in cash at the environment department station on Apo Island, usually after the day's diving, and cards and transfers are no use there. The Municipality of Sablayan publishes the amounts. As read on 19 August 2026, a local diving visitor pays PHP 2,860 and a foreign one PHP 3,530, with lower rates for snorkellers and picnic visitors and separate rates for dive masters and tour guides3. A visit counts as 48 hours or less. Boat hire is deliberately left off the schedule and is agreed through the same office, and older figures still circulating from a superseded schedule will not match what you are asked for.

Two park rules change what you pack. Everything living is protected, park-wide, with fishing, collection and harvesting banned since 2007. Single-use plastics have been out since 13 June 2023 under a management board ordinance whose prohibited list is specific and long: bags, disposable cutlery, straws, stirrers, cups, bowls, plates, clingwrap, clamshell containers, small bottled water and soft drinks, doypacks, balloons, cotton buds and plastic-based wet wipes, with a one-year ban from the park at a fourth offence4. Pack the day bag accordingly. No diver-to-guide ratio, daily cap or closed season is published for the park, so what limits a day here is the boat and the weather.

December to May is the dry season and March to May the calm end of it. The reef is diveable all year, which is a real difference from the country's other marine park, but between June and November what you lose is the crossing, not the visibility: a typhoon cancelled a liveaboard in November 2025 and the water stayed murky for days afterwards. Visibility on a good day runs 20 to 30 metres and drops to around 15 in the rains. The water holds in the high twenties all year, so 3 mm of neoprene does the job. Current is the one thing to respect, strong at times and able to turn mid-dive, hardest along the northern side.

One last thing, and it is the cheapest to fix. Briefing quality on budget bangka trips varies, and divers have come back from this reef without having been told the name or the shape of what they dived. Ask for the site, the depth and the plan before you kit up.

A submerged sub-triangular platform of about 34 square kilometres, made of a northern and a southern atoll-like reef separated by a 30 metre channel that opens to the west. Three islands break the surface: Apo Island at 22 hectares with mangrove and a shallow lagoon, rocky limestone Apo Menor, and the bare coralline rock of Cayos del Bajo. The protected area covers 15,792 hectares with a further 11,677 hectares of buffer, 27,469 in total.