Raja Ampat, Indonesia
    TAMAN WISATA PERAIRAN KEPULAUAN RAJA AMPAT

    Koi island

    Best months: Dec–Apr

    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.

    Best timeDec–Apr
    WetsuitNo wetsuit needed, or a rash guard
    Marine lifeBlacktip Reef Sharks, Manta Rays, Mobula Rays (Devil Rays), Pygmy Seahorses and Sea Turtles · 236+ species recorded
    Water29-30°C · warmest May, November, December
    CharacterReef dive
    StandoutExceptional marine biodiversity

    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.

    Today06:0118:0812h 7m daylightGolden hour 17:41

    Nearest Dive Centres to Koi island

    Dive shops near Koi island

    View all dive centres in Raja Ampat

    Reviews for Koi island

    Sign in to write a review

    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)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    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)

    Plan & book

    Ways to dive Raja Ampat, from day trips to liveaboards.

    Day trips & courses

    via GetYourGuide

    Guided dives, courses and snorkel trips with instant booking.

    Find dive trips in Raja Ampat

    Places to stay

    via Booking.com

    Hotels and dive resorts near Raja Ampat.

    Search stays in Raja Ampat

    Dive insurance

    Most travel insurance excludes or limits scuba. Check what you need before you go.

    Dive insurance explained

    Partner links: we may earn a commission if you book, at no extra cost to you. How we make money

    Where to Stay near Koi island

    Prices from Booking.com. We may earn a commission at no extra cost to you.

    Back to Raja Ampat