Diving atSunken Island (Philippines)
Sunken Island presents itself as an extraordinary underwater pinnacle, its summit beginning around 23-25 m (75-82 ft) below the surface in the open sea. Divers are immediately met with the unique sensation of descending into the blue, aiming for this isolated mount. It forms a distinct deep-water structure, characterized by its steep walls and relatively small diameter at the top before plunging into deeper sections. This site is a truly submerged island, marked primarily by its mooring line.
As evening covers Sunken Island, the local air temperature is measured at 28.9°C. The current wave height at the surface is recorded at 0.04m. These late-day readings characterize the surface conditions for the night.
Dive Site Coordinates
9.8587, 123.3442
Dive Site Characteristics
Key Dive Site Facts
Dive Site Overview
An underwater pinnacle in the open sea near Moalboal, Cebu, Philippines, Sunken Island attracts divers seeking a particular challenge and experience. Many divers specifically request to visit this location, drawn by its distinct characteristics and prolific marine life.
Its ascent from the abyss begins with its top at approximately 23-25 m (75-82 ft) below the surface. From there, it stretches down to a maximum depth of 60 m (197 ft). Reaching this submerged mount involves dropping through vast open blue water.
A hand-over-hand descent along the mooring line is often necessary until the pinnacle becomes visible. It's a dive that requires an Advanced Open Water certification or equivalent, given the potential for strong and unpredictable currents that sweep across the site.
A primary draw for many divers lies in the abundance of pelagic fish that school vigorously around the pinnacle. These fish often showcase behaviors described as 'on edge' due to the known presence of larger predators.
Observing these interactions within the currents is a key part of the experience. While specific historical records are limited, the local dive community consistently recognizes it as a dynamic site where bigger creatures are known to patrol the deep. Consistent sightings, however, require a degree of patience and luck.
This isolated structure effectively funnels nutrients and attracts a diverse food chain, making every dive a potential encounter with the unexpected.
Best Time to Dive
Optimal diving conditions at Sunken Island are generally experienced from December to June, with November also showing excellent scores. During these months, the average air temperature hovers around 26.6-28.6°C (80-83°F), accompanied by lower rainfall, often below 7 mm. Winter water temperatures range from 24-28°C (75-82°F), while summer months see the water warm up to 26-30°C (79-86°F). Wave heights are typically lower during this period, particularly from April to June, which helps mitigate surface chop and improves overall comfort. Diving is possible year-round; however, the months outside this peak season may present slightly higher rainfall and more variable wave conditions, as evidenced by 'Good' dive scores in the system data for June, July, September, and October.
Climate Historical Averages
Monthly records compiled from satellite and marine observation nodes over the last 3 years. Data provided by Open-Meteo and MET Norway.
Dive Experience & Conditions
Current dynamics are a defining feature of Sunken Island, often described as strong and featuring both upcurrents and downcurrents. These currents necessitate careful planning and advanced diving skills, creating an environment where divers often feel an anticipation for encounters with large pelagics. Visibility at this open-water site can range widely, from 12 m (40 ft) to as much as 40 m (130 ft), depending on oceanic conditions. Surface conditions can include mild surge, but underwater, the primary concern remains the powerful water movement. Boat entry is the standard approach to this offshore pinnacle. Water temperatures maintain a comfortable range, typically between 26-30°C (79-86°F) in summer and 24-28°C (75-82°F) in winter, allowing for extended bottom times if current conditions permit.
Dive Difficulty & Safety Guidelines
Diving at Sunken Island requires an advanced level of certification, such as an Advanced Open Water Diver or CMAS**, primarily due to the site's challenging conditions. Strong currents, including both upcurrents and downcurrents, are a consistent hazard and demand excellent buoyancy control and situational awareness. Descending to the interesting depth range of 25-30 m (82-98 ft) and beyond, potentially to a maximum depth of 60 m (197 ft), means divers must be proficient in deep diving procedures. Prior experience with drift dives is highly recommended. It's crucial to follow your dive guide's instructions closely, especially regarding entry and exit strategies around the mooring line. Fortunately, no specific permits are consistently reported as required for diving this site.
Recommended Equipment
No verified equipment items yet.
Verified equipment recommendations for this dive site are being reviewed and may be added as additional source checks are completed.
Recommended Dive Suit
In conditions like these, many divers prefer diving with dive skin or rash guard. A hood or vest is suggested for sensitive divers due to surface winds.
Divers entering the water at Sunken Island today can expect temperatures near 29°C (85°F) beneath the surface. Surface air temperatures are resting at 29°C (84°F).
Environmental conditions appear stable for the near future.
Conditions last reviewed: 18:00 using the latest environmental data.
Dive Logistics & Preparation
Hyperbaric Chamber
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Entry Requirements
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Currency
PHP
Nearest Airports
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Marine Life at Sunken Island
The underwater landscape of Sunken Island, with its steep walls and distinct pinnacle structure, acts as a magnet for a diverse range of marine life. Divers should keep an eye on the deep blue for larger creatures, including schools of jack fish and batfish, as well as the occasional shark and other pelagic species. Closer to the pinnacle, the coral gardens, sponges, and gorgonians provide shelter for colorful reef fish. Encounters with sea turtles are possible, and the site is known for smaller, more elusive inhabitants like frogfish, lionfish, snappers, groupers, scorpion fish, and even Spanish dancers. This site's unique structure in the open ocean makes it an ideal spot to observe the behavior of fish interacting within strong currents.
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Frequently Asked Questions
What kind of dive site is Sunken Island?
Sunken Island is an underwater pinnacle or mount located in the open sea. Its summit is found at approximately 23-25 meters (75-82 feet) below the surface, and its sides drop off steeply into much deeper waters.
What is the maximum depth at Sunken Island?
The maximum depth reported for Sunken Island is 60 meters (197 feet). However, the most interesting depth for viewing marine life and exploring the pinnacle's top is typically between 25-30 meters (82-98 feet).
Are there strong currents at Sunken Island?
Yes, Sunken Island is known for strong and sometimes unpredictable currents. Both upcurrents and downcurrents can be present, requiring divers to have advanced skills and good buoyancy control.
What marine life can divers expect to see?
Divers can expect to see schools of jack fish, batfish, and various pelagic species, with occasional shark sightings in the blue. The pinnacle itself hosts colorful reef fish, sea turtles, frogfish, lionfish, snappers, groupers, and scorpion fish among its coral formations.
What certification level is required for this dive?
Due to the depth and strong currents, Sunken Island is recommended for advanced divers. An Advanced Open Water Diver (AOW) certification or equivalent is generally required.
When is the best time to dive Sunken Island?
The best time to dive Sunken Island is generally from December to June. These months offer lower rainfall, more consistent water temperatures, and often calmer surface conditions for boat travel.
Is snorkeling possible at Sunken Island?
Snorkeling at Sunken Island is not typically recommended. The site's summit is at 23-25 meters (75-82 feet) depth, and strong currents make it unsuitable for surface activities.
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