Diving atSunken Island (Indonesia)
Sunken Island diving offers a visual journey from its sunlit upper reaches into deeper, vibrant ecosystems. Descending feels like exploring a living monument, where currents sculpt coral into breathtaking formations. This site rewards observant divers, revealing intricate details along its slopes and walls. A transition from a shallow plateau to an extensive underwater structure creates a truly immersive experience.
Early observations for Sunken Island report a surface air temperature of 29.5°C. The water surface is currently presenting wave heights of 1.4 m. Consider these environmental metrics before beginning your descent.
Dive Site Location & Key Facts
Everything you need to know about this dive site.
Dive Site Overview
Known as Gili Anyaran, Sunken Island's distinctive topography captivates divers. What begins as a picturesque plateau, typically found between 0 and 8 meters / 0 and 26 feet, gradually gives way to an extensive sloping reef system before plunging into an impressive underwater wall.
This dramatic geological formation creates an exceptionally diverse habitat, supporting a wide array of marine species across its different zones. Divers often commence their adventure on the shallower reef, where vibrant hard and soft corals thrive under ample sunlight, observing creatures such as humped parrotfish and various turtles. Progression into deeper sections reveals a different world, where different sharks, cephalopods, and numerous macro subjects reside.
Its maximum recorded depth reaches 28 meters / 91 feet, though compelling reef life extends well into shallower zones, offering ample exploration opportunities. Diving here provides a comprehensive cross-section of reef environments, ranging from vibrant sunlit corals to the dramatic, current-swept deep walls, each zone presenting unique encounters.
Sunken Island
Conditions are Good
Best Dive Window
Optimal conditions expected
Current conditions near Sunken Island show 30° air, 29° sea temperature, 1.4 m waves, and 24 km/h wind. Forecast data is refreshed regularly to ensure accuracy.
Best Time to Dive
Optimal diving at Sunken Island hinges on understanding its seasonal conditions, which largely offer favorable experiences year-round. The period from May through October generally sees the lowest rainfall, with averages around 0.5-2.4 mm, contributing to good visibility and calmer seas. Air temperatures during these months remain consistently warm, typically ranging from 26.5-28.5°C / 80-83°F. While the months of November to April experience higher rainfall, peaking around 9.9-10.1 mm in January and February, the site maintains a 'Good' dive score for most of the year. February is rated 'Moderate', but still entirely diveable. Water temperatures are consistently warm, generally ranging between 28-30°C / 82-86°F, regardless of the season, ensuring comfortable diving throughout. Given the minimal seasonal variation in dive scores, Sunken Island offers a rewarding experience across much of the calendar.
PEAK SEASON SCORE
Scores combine air & water temps, waves, wind & rainfall for overall conditions.
BEST MONTHS TO DIVE
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
Conditions at Sunken Island feature a shallow, vibrant plateau, offering immediate access to prolific reef life. From an initial depth, terrain transitions into a dynamic slope, eventually leading to an impressive underwater wall that descends to its maximum depth. Water temperatures consistently stay warm, often around 28-30°C / 82-86°F. Noticeable currents are frequent, ranging from mild to strong, varying with tidal movements. Such currents play a vital role in bringing nutrients to the reef, attracting schooling fish and larger pelagics. Visibility typically remains good, frequently ranging between 15-30 meters / 50-100 feet, allowing clear views of extensive coral structures and marine inhabitants. Divers should prepare for varying current strengths, integral to the site's dynamic character.
Dive Difficulty & Safety Guidelines
Diving Sunken Island requires specific considerations due to the potential for strong currents. Divers should always plan dives to account for these conditions, using tidal charts when available to optimize entry and exit points. A surface marker buoy (SMB) and reel are highly recommended safety tools, proving invaluable for indicating your whereabouts to the tender crew, especially if an open water ascent becomes necessary. While reef hooks can be useful for maintaining your spot in strong currents, ensure deployment only on non-living substrate to prevent damage to delicate coral ecosystems. Maintaining situational awareness and practicing good buoyancy control are crucial for a safe, enjoyable dive here. Always dive within training limits and with a reliable buddy.
Recommended Equipment
- Dive Computer
- DSMB
This gear list is based on verified equipment signals for Sunken Island, Indonesia. Always confirm final gear choices with your dive operator, guide, or liveaboard.
Recommended Dive Suit
Forecasts suggest a slight cooling pattern in the days ahead. Cooler days are ahead; you might want a warmer option for later in the week. Divers planning multiple dives may appreciate having a warmer option available.
Even in warm destinations, extended dives can gradually draw heat away from the body.
Exposure protection such as dive skin or rash guard is commonly used when diving in waters of this temperature. A hood or vest is suggested for sensitive divers due to surface winds. The latest environmental readings for Sunken Island suggest water temperatures around 29°C (84°F). Surface air temperatures are resting at 30°C (85°F).
Emergency & Medical Support
Essential information to help you plan your dive trip to Sunken Island.
Hyperbaric chambers are a critical part of dive safety infrastructure. Availability varies significantly by region, and not all dive areas have immediate access.
Before diving, it's recommended to:
- confirm nearest medical facilities
- check emergency procedures with local dive operators
- ensure dive insurance covers evacuation if required
Divers Alert Network
Diving emergency assistance available through DAN World.
+1-919-684-9111- 24/7 emergency hotline
- Diving medical assistance
- Evacuation coordination
Emergency contacts are provided for reference. Always verify local emergency services before diving.
Marine Life at Sunken Island
Marine encounters at Sunken Island showcase a thriving ecosystem. Divers frequently spot white-tip sharks patrolling deeper slopes, while green and hawksbill turtles gracefully navigate the reef. A picturesque plateau often hosts schools of humped parrotfish and vibrant soft coral gardens. Exploring the underwater wall offers a good chance of encountering fascinating creatures such as cuttlefish, octopus, and well-camouflaged crocodile fish. Numerous captivating macro subjects can be found amongst the coral, ensuring even experienced divers find something new. Giant anemones sway with currents, hosting various clownfish species, all contributing to the site's extraordinary colors and active fish populations.
Dive Sites Near Sunken Island
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Dive Centers Near Sunken Island
Working Hours
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Nearest Airports
Nearest airports to help plan travel to this dive area.
Search Flights
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Search Flights on ExpediaFrequently Asked Questions
What is the maximum depth at Sunken Island?
Sunken Island offers diving to a maximum recorded depth. While the site features a deep wall, much of the vibrant marine life is also found on the shallower plateau and along the slopes.
What marine life can I expect to see?
Divers commonly encounter white-tip sharks, green and hawksbill turtles, humped parrotfish, cuttlefish, and octopus. The site also features giant anemones, crocodile fish, and a variety of macro subjects within its extensive coral formations.
Are there strong currents at Sunken Island?
Yes, currents at Sunken Island can be strong, varying with tidal movements. These currents are a key feature of the site, bringing nutrients that support its rich marine biodiversity. Proper dive planning is essential.
What are the water temperatures like?
Water temperatures at Sunken Island are consistently warm throughout the year. Divers can typically expect temperatures ranging from 28-30°C / 82-86°F, making for very comfortable diving conditions.
What is the best time of year to dive at Sunken Island?
Sunken Island offers good diving conditions for much of the year. The drier season from May to October generally has less rain and calmer seas, while air temperatures remain warm. Dive scores are consistently rated 'Good' across most months.
What equipment is recommended for diving here?
A dive computer and a surface marker buoy (SMB) with a reel are highly recommended for safety, especially given potential currents. A thin wetsuit or shorty for warmth, along with booties for comfort during boat entries, are also advisable.
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Sunken Island
Conditions are Good
Best Dive Window
Optimal conditions expected
Current conditions near Sunken Island show 30° air, 29° sea temperature, 1.4 m waves, and 24 km/h wind. Forecast data is refreshed regularly to ensure accuracy.