Dive Site: Sombrero Island

About Sombrero Island

Sombrero Island, aptly named for its unique hat-like silhouette, is an uninhabited gem nestled off the eastern tip of Tingloy Island in Batangas province, within the renowned Anilao Batangas Marine Park Sanctuary. This dive site is celebrated for its exceptional biodiversity, positioned within the Verde Island Passage, often referred to as the "center of the center of marine biodiversity." The underwater topography features stunning coral walls and slopes that encircle the island, ranging in depth from 5 to 30 meters. These reefs are carpeted with vibrant hard and soft corals, including striking yellow Tubastraea cup corals. Wide gullies and immense coral heads provide shelter and habitat for a rich assortment of reef fish and invertebrates. The currents at Sombrero Island can be formidable and unpredictable, nourishing the corals and attracting large pelagic species such as trevallies, jacks, and tuna, alongside schools of rainbow runners. While encounters with large pelagics are possible, the site is particularly famous for its macro life, boasting an impressive variety of nudibranchs, frogfish, and other exotic critters. The area's reputation as the birthplace of scuba diving in the Philippines, coupled with its immense macro diversity, makes it a prime destination for underwater photographers. Divers typically access Sombrero Island by traditional Filipino "Banca" boats from nearby resorts in Mabini, with the journey taking about 20-25 minutes. Due to its exposed location, surface conditions can be choppy, especially in the afternoons. Diving is best when currents are manageable, often during neap tides, offering clear visibility for exploring its rich underwater world.

Dive site facts: Sombrero Island

Depth

5–30 m

Current

Moderate to strong

Visibility

20–30 m

Water temperature

25–30°C

Entry

Boat

Level

Intermediate

Dive type

Reef wall, coral garden, macro

Region / port

Anilao, Batangas

Coordinates

13.555, 121.073

Conditions & Currents

Sombrero Island is known for its strong and often unpredictable currents, which can flow from various directions. Divers should be prepared for stiff surge near the surface, especially upon entry, and potentially ripping currents and formidable undertows at depth. The exposed location of the island contributes to these dynamic conditions, making current experience beneficial. While currents can be intense, there are occasional periods of no current, offering a more tranquil dive experience. Visibility can be excellent, typically ranging from 20-30 meters. Due to the potential for strong currents, boat entries are common, and divers often use the numerous gullies and coral heads as natural shelters from the "liquid headwinds" during their descent. Slack tide or neap tides often offer the most favorable conditions.

Marine life & sighting chances

Soft corals

common

Hard corals

common

Schooling fish

common

Turtles

occasional

Rays

occasional

Trevally

common

Snappers

occasional

Blue-ringed octopus

occasional

Tubastraea cup corals

common

Anthias

common

Triggerfish

occasional

Lionfish

occasional

Batfish

occasional

Giant frogfish

occasional

Dive profile & how the dive runs

Dives at Sombrero Island typically begin with a boat entry, often close to the northern shoreline, though multiple entry points are used depending on current direction. Due to potential strong surface surge, negative entry might be preferred. Upon descent, divers navigate through gullies and around large coral heads that provide some shelter from currents. The dive progresses along the coral walls and slopes surrounding the island, which range from 5 to 30 meters. Routes often incorporate the 'hat rim' that stretches north to south underwater, or the more sheltered east face. A common area of interest is Batok, behind the island, known for its coral gardens and schooling fusiliers. Divers spend time exploring the vibrant hard and soft corals, keeping an eye out for macro critters in crevices and pelagics in the blue. The turn point is often dictated by air consumption or current strength, with the safety stop conducted in shallower, sometimes more sheltered, areas of the reef.

Underwater photography

Sombrero Island offers exceptional opportunities for both wide-angle and macro photography, though the latter is particularly celebrated. For wide-angle shots, a fisheye or wide-angle lens is ideal to capture the expansive coral walls, schooling fish, and the unique underwater topography. Strong currents mean photographers should prioritize good buoyancy control to avoid damaging corals or stirring up sediment. When focusing on macro subjects like nudibranchs, frogfish, or porcelain anemone crabs, a macro lens is essential. Utilizing snoots can help isolate subjects against busy backgrounds and highlight intricate details. Patience is key, especially when searching for the abundant small critters in every nook and cranny. Be mindful of your dive guide; they are adept at spotting rare species. Given the potential for strong currents, securing your camera gear and maintaining situational awareness is crucial.

Combine with nearby dive sites

• Anilao — Secret Bay

  Famous for muck diving and macro photography

• Cathedral Rock

  Known for its unique underwater rock formations and diverse marine life

• Verde Island Passage

  Part of the wider region, a global biodiversity hotspot

• Apo Island

  Recognized for its marine sanctuary and turtle populations

• Puerto Galera — Canyons

  Famous for drift diving and strong currents

Getting there & logistics

To reach Sombrero Island, divers typically fly into Manila (MNL) and then take a private transfer or public bus to Anilao, Batangas. The journey from Manila to Anilao usually takes 2.5 to 3.5 hours. From resorts in Mabini, the boat ride to Sombrero Island is approximately 20-25 minutes by traditional Filipino "Banca." Day trips are common, as Sombrero Island is often part of a wider Anilao dive itinerary. There are no specific park fees mentioned for Sombrero Island itself, but many dive resorts offer packages that include boat transfers and guided dives. Anilao is known for being the birthplace of scuba diving in the Philippines, with numerous resorts and dive shops catering to all levels.

Safety & environment

Diving at Sombrero Island requires careful attention to safety protocols due to potentially strong and unpredictable currents. Divers should have appropriate experience with current diving and maintain excellent buoyancy control. Always dive with a reputable dive operator and follow your dive guide's instructions closely, especially regarding entry and exit procedures. The nearest recompression chamber is typically found in Batangas City, but emergency evacuation to Manila may be required for serious incidents. It is highly recommended to have comprehensive dive insurance that covers emergency medical treatment and evacuation. Always carry a surface marker buoy (SMB) for safety in case of surfacing away from the boat, particularly given the dynamic current conditions. Adherence to marine park regulations, including no touching or collecting, is essential to preserve the fragile ecosystem.

Who it suits — and who it doesn't

FAQ

Sombrero Island FAQ

Liveaboards diving Sombrero Island

These liveaboards may visit Sombrero Island on selected itineraries — the exact dive sites depend on departure, weather and conditions.

Infiniti

Philippines

25 guests39 m

$280/day

Seadoors

Philippines

16 guests25 m

$335/day

Resolute

Philippines

16 guests34.6 m

$314/day

Dolphin

Philippines

18 guests31 m

$326/day

Navis 1

Philippines

22 guests23 m

$250/day

Philippine Siren

Philippines

16 guests

$309/day

Palau Sport

Philippines

24 guests38.35 m

$215/day

Philippines Aggressor

Philippines

26 guests42.7 m

$381/day

Stella Maris Explorer

Philippines

20 guests33 m

$398/day

Solitude One

Philippines

24 guests52 m

$460/day

Atlantis Adventurer

Philippines

16 guests32.5 m

$421/day

Philippines Aggressor II

Philippines

26 guests42.7 m

$247/day