Indonesia · Lesser Sunda Islands
Komodo National Park
Long main season with good visibility, manta encounters and liveaboard conditions.
Komodo sits at the meeting point of the Indian and Pacific Oceans, and the cold, nutrient-rich upwellings that funnel between its islands feed an extraordinary food chain — from coral gardens dense with reef fish to manta cleaning stations, sharks, dolphins and the occasional pelagic. The north of the park is warm, blue and current-driven; the south is cooler, greener and built for mantas and macro. Most divers visit by liveaboard, looping both halves over a week.
Good season
April–June and September–November are the sweet spots: calm seas, warm water (27–29°C) and visibility often above 25m in the north. July–August brings cooler southern water (22–24°C), thicker plankton, and the highest manta odds. The park stays divable year-round but January–March sees stronger wind and rain.
Trip duration
Most divers come for 6–10 nights on a liveaboard, or 4–7 nights land-based out of Labuan Bajo with day trips to the nearer central sites.
Dive style
Drift diving in moderate-to-ripping current is the norm. Liveaboards dominate because the best sites are spread across both ends of the park; expect 3–4 dives a day, negative entries, and reef hooks at sites like Castle Rock and Crystal Rock.
Dive level
Advanced Open Water with 30+ logged dives is the realistic floor — operators will let Open Water divers join the calmer central sites, but the marquee dives (Batu Bolong, Castle Rock, Shotgun, Manta Alley) all involve current and depth. Comfort with drift and negative entries matters more than certification cards.
Reef health
What you’ll actually findOne of the few reefs whose live coral has held up over the last decade. Plan with confidence.
Coral reef health
How is this calculated?Heat stress right now
Mild warmth. Worth watching — no bleaching yet.
NOAA Coral Reef Watch · updated May 2026 · 1.4 °C-week heat dose
What to expect on a dive
Komodo's strong currents drive nutrient upwelling that supports unusually intact reefs. Expect manta cleaning stations, big schools, and full coral cover.
Sources, methodology, and the raw numbers
Raw observed numbers
- Coral cover: 50% (survey Sep 2024, Reef Check Indonesia/Malaysia/Philippines survey)
- Bleached: 5%
- Recent mortality: 1%
- Coral Triangle — observed condition reflects the stable regional pattern.
Raw thermal numbers
- NOAA CRW alert level: Watch
- Degree Heating Weeks: 1.4 °C-wk
- SST anomaly: +1.1 °C
How we summarise this
Observed coral cover, bleaching, and mortality come from named in-situ surveys with a stated date and method — they describe one snapshot of one reef and do not extrapolate to neighbouring sites. Current thermal stress is satellite-derived from NOAA Coral Reef Watch at ~5 km resolution; it indicates risk, not observed coral damage. We deliberately separate observed condition, current thermal stress, and projection — and we never publish a projection without a documented model and uncertainty.
Sources
- Reef Check — Reef Check Foundation
- NOAA Coral Reef Watch — U.S. National Oceanic and Atmospheric Administration
- AIMS Long-Term Monitoring Program — Australian Institute of Marine Science
- Global Coral Reef Monitoring Network — GCRMN / ICRI
- Atlantic and Gulf Rapid Reef Assessment — AGRRA Program / Perry Institute for Marine Science
- NOAA National Coral Reef Monitoring Program — NOAA Coral Reef Conservation Program
- NOAA CoastWatch / OceanWatch — NOAA NESDIS / STAR
- Allen Coral Atlas — Arizona State University Center for Global Discovery and Conservation Science
- Great Barrier Reef Marine Park Authority — Australian Government
- International Coral Reef Initiative — ICRI Secretariat
- Reef Life Survey — Reef Life Survey Foundation
- NASA PO.DAAC — NASA Jet Propulsion Laboratory / Caltech
- Copernicus Marine Service — Mercator Ocean International for the European Union
- NASA Ocean Color (OB.DAAC) — NASA Goddard Space Flight Center / Ocean Biology Processing Group
- Argo float network — International Argo Program / UCSD
- CoralWatch — University of Queensland
- IMOS / AODN — Integrated Marine Observing System / Australian Ocean Data Network
- WRI Reefs at Risk Revisited — World Resources Institute
- Ocean Health Index — OHI partnership (Conservation International + UCSB + NCEAS)
- IPCC Special Report on the Ocean and Cryosphere (SROCC) — Intergovernmental Panel on Climate Change
- GOA-ON — Global Ocean Acidification Observing Network — GOA-ON Secretariat + IOC-UNESCO
- HAEDAT — Harmful Algae Event Database — IOC-UNESCO Intergovernmental Panel on Harmful Algal Blooms
- NCEI Marine Microplastics — NOAA National Centers for Environmental Information
Reef condition changes year to year. If you visit, consider supporting responsible-travel and conservation operators on the ground.
Pressure on this reef
Protection · fishing · what you can doProtected-area status
No-take reserveFully no-take — no fishing of any kind. The strongest protection tier.
Fishing pressure
Low fishing pressureDominant pressures
- dive tourism
- anchor damage from liveaboards
4 Green Fins-verified operators known at this location.
What you can do
Komodo National Park is a UNESCO World Heritage Site with strict no-take zoning. Permit fees fund rangers — choose operators who park on moorings rather than anchors.
Protection status sourced from Protected Planet / WDPA and refined with Marine Protection Atlas. Fishing pressure proxy is Global Fishing Watch AIS data. See the methodology for what these sources can and can’t prove.
Dive sites here
9 curated
Manta Alley
Cleaning and feeding station on the south side of Komodo where mantas come in to be cleaned by wrasse. Calmer than Batu Bolong, but a long b…
Castle Rock
Submerged pinnacle in Komodo's north — top of the rock sits at 4 m, drops to 40+ m. Strong current splits around the rock and concentrates s…
Batu Bolong
A single rocky pinnacle in the middle of Komodo's central straits. Currents split around it, leaving one side calm enough to drift the wall …
The Cauldron / Shotgun
A high-energy channel drift between Gili Lawa Laut and Gili Lawa Darat in north Komodo. Divers start over coral gardens and a bowl-shaped sa…
Mawan
A central Komodo manta cleaning station off Pulau Mawan, west of Siaba Besar. The dive follows white sand, coral rubble and bommies where re…
Alor
Alor offers dynamic diving where strong currents fuel vibrant coral reefs and attract pelagic encounters. Explore diverse topography includi…
Gili Islands
The Gili Islands offer diverse diving experiences with vibrant coral reefs, abundant reef fish, and occasional pelagic sightings. Expect cle…
HMAS Perth
The HMAS Perth II is a 133-meter former Royal Australian Navy guided missile destroyer, purposefully scuttled as an artificial reef in King …
Cannibal Rock
A seamount in Loh Dasami (Horseshoe Bay) at the far south of Komodo National Park, between Rinca and Nusa Kode. The pinnacle tops out around…
Gear
What to bringSite-specific add-ons
Some dive sites here call for extra gear. Check the individual site page for full context.
- Camera (wide-angle) — Mantas can be close enough to fill the frame. Strobes optional in clear water. · Manta Alley
- Reef hook — Top of the rock is exposed to ripping current — hooking in is the only way to watch the action. · Castle Rock
- SMB + reel — Drift surfacings put you over 40m of water — SMB required. · Castle Rock
- Reef hook with lanyard — Current can pin you to the wall — hooking onto dead reef saves air and posture. · Batu Bolong
- Heavier wetsuit (mid-year) — Southern Komodo upwellings drop the water temperature sharply in June–September. Layer up. · Batu Bolong
- Dive computer — Deep, current-rich dives — accurate NDL tracking matters. · Batu Bolong
- SMB — The final drift can separate divers from the reef, and boat pickup is often in moving water. · The Cauldron / Shotgun
- Reef hook — Some guides permit hooks on dead substrate for brief holds near manta or shark action, but only use one if the briefing allows it. · The Cauldron / Shotgun
- Macro lens or torch — The rubble and bommies hold nudibranchs, shrimp and small cryptic subjects between manta passes. · Mawan
- 5mm wetsuit — South Komodo upwelling drives cold thermoclines that can drop below 22 C, especially June-September. · Cannibal Rock
- Camera (macro) + dive light — The draw is small, cryptic critters on a soft-coral wall, often best worked on a slow or night dive. · Cannibal Rock
What divers say
“The current at Castle Rock pinned us flat to the reef while jacks tornadoed overhead and grey reefs hunted them — it's the closest thing to a nature documentary I've ever been inside.”
“Two dives a day for a week and I still felt like we'd only scratched the surface. The north is electric, the south is weird and quiet and full of mantas. Both deserve their own trip.”
“Komodo isn't the prettiest reef I've dived — Raja wins that — but it's the most alive. Every dive felt like something was about to happen.”