27m
    Beginner
    Rock Islands, Palau
    Koror Southern Lagoon

    Iro Maru Wreck Palau

    Best months: Nov–Mar

    Protected Area

    Koror Southern Lagoon

    Why dive here

    With 182+ marine species recorded in the area - including barracuda, lionfish, mandarin fish, napoleon wrasse and nautiluses - Iro Maru Wreck Palau offers some of Rock Islands's richest wreck diving. Water ranges 29-30°C, warmest June, October, November.

    Best timeNov–Mar
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeBarracuda, Lionfish, Mandarin Fish, Napoleon Wrasse and Nautiluses · 182+ species recorded
    Water29-30°C · warmest June, October, November
    CharacterWreck dive · max 27m
    StandoutExceptional marine biodiversity

    The Iro Maru is one of those wrecks we always make time for when we're in Palau, especially if we have newer divers in the group. It’s a 143-meter oiler, sunk during Operation Hailstone in 1944, sitting upright on the seabed at a comfortable 27 meters. What we really love about the Iro is its sheer accessibility and how much there is to poke around in without needing advanced certs. You can swim through the superstructure, peer into the engine room, and even pop down into the cargo holds if you're comfortable. Light filters in through bomb damage and open hatches, illuminating schools of glassfish that swirl like silver clouds. We've seen moray eels peeking from pipes, schools of batfish circling the mast, and robust lionfish perched regally on decks. It’s an almost perfect introduction to wreck diving, with plenty of intact structure to explore and a fascinating history you can practically feel. The bow gun is always a highlight, a really stark reminder of its past. We’d suggest going in the morning; the light penetration can be magic.

    Typical Iro Maru Wreck Palau Dive Profile

    10m20m30mSafety Stop0m27m max~30 min estimated bottom time

    Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.

    Safety Notes

    Depth of 27m - Advanced Open Water certification recommended.

    Wreck site - avoid penetration without wreck diving certification. Watch for sharp metal and entanglement hazards.

    Always perform a 3-minute safety stop at 5m before surfacing.

    Today05:5017:5012h 0m daylightGolden hour 17:22

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    Conditions

    Ocean conditions, forecast and tides for Iro Maru Wreck Palau

    Iro Maru Wreck Palau Ocean Conditions

    Monthly averages for Iro Maru Wreck Palau, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (7.2, 134.3) (4km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    30°C

    86°F · Range: 28.5–31.2°C

    Current Speed

    10.05 cm/s

    Direction: N (5.7°)

    Chlorophyll-a

    0.026 mg/m³

    Very clear (oligotrophic)

    Salinity

    33.62 PSU

    Based on 4 years of monitoring data · Data sources: Open-Meteo marine data + Copernicus Marine (EU)

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