Koi island
Protected Area
TAMAN WISATA PERAIRAN KEPULAUAN RAJA AMPAT
Why dive here
With 236+ marine species recorded in the area - including blacktip reef sharks, manta rays, mobula rays (devil rays), pygmy seahorses and sea turtles - Koi island offers some of Raja Ampat's richest reef diving. Water ranges 29-30°C, warmest May, November, December.
Koi Island is one of those Raja Ampat sites we’d happily dive on repeat. It's a slope, not a wall, and that subtle angle really lets the light play on the corals as you drift. We love the feeling of being gently pushed along, spotting white-tip and black-tip reef sharks cruising below. Look closely for the Pygmy seahorses, both Denise’s and Bargibant’s are often nestled in the gorgonians. The reef here starts shallow, around five meters, and then slopes to a maximum of 21 meters, which makes it an ideal spot for a longer, relaxed dive. We’ve had some truly fantastic drifts with visibility often hitting 20 meters, though it can drop a bit if the currents are really ripping. You'll pass schools of fusiliers, sweetlips, and snapper, often finding a cruising eagle ray in the blue. Keep an eye out for the Flame Cardinalfish and Snakehead Cowries, they’re just lovely. It’s a site that suits anyone comfortable with a gentle drift, offering plenty of time to soak it all in.
Safety Notes
Strong currents typical this month (avg 35 cm/s). Good buoyancy control essential.
Nearest Dive Centres to Koi island
Dive shops near Koi island
Papua Diving - Kri Eco Resort
Yenkoranu Homestay
Wobegong Dive Center
Koranu Fyak Homestay
Delvin
Lumba Lumba
Reviews for Koi island
Conditions
Ocean conditions, forecast and tides for Koi island
Koi island Ocean Conditions
Monthly averages for Koi island, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (-0.5, 130.6) (0km away)
October Averages
Sea Temperature
30°C
86°F · Range: 29.2–30.9°C
Current Speed
34.71 cm/s
Direction: NW (311.5°)
Chlorophyll-a
0.138 mg/m³
Clear water
Salinity
34.33 PSU
Based on 4 years of monitoring data · Data sources: Open-Meteo marine data + Copernicus Marine (EU)
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