Chuuk (Truk) Lagoon, Micronesia

    Yamagiri Maru

    Best months: Jan–May

    Why dive here

    With 195+ marine species recorded in the area - including barracuda, blacktip reef sharks, eagle rays, grey reef sharks and whitetip reef sharks - Yamagiri Maru offers some of Chuuk (Truk) Lagoon's richest wreck diving. Water ranges 29-30°C, warmest August, October, November.

    Best timeJan–May
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeBarracuda, Blacktip Reef Sharks, Eagle Rays, Grey Reef Sharks and Whitetip Reef Sharks · 195+ species recorded
    Water29-30°C · warmest August, October, November
    CharacterWreck dive
    StandoutExceptional marine biodiversity

    The Yamagiri Maru, for us, is one of those Chuuk wrecks that just hits different. It’s got an almost eerie, melancholic feel to it, lying on its starboard side, cut in half by a torpedo. We love pushing into the stern section’s cavernous hold, which is full of Type 96 140mm shells, big enough to make you feel tiny. The light filters in through openings, creating these dramatic shafts that highlight the rusted metal and the schools of glassfish swirling around the ordinance. The bow section is a different beast entirely, much more collapsed and overgrown, but it’s where you often find the bigger pelagics cruising by – we’ve seen grey reef sharks here a few times, just ghosting past the hull. The sheer scale of the ship, even in its broken state, is a powerful reminder of its wartime role. It’s a dive for those who appreciate the history as much as the corals that now soften its edges, a truly immersive experience that leaves you thinking long after you surface.

    Safety Notes

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

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    Conditions

    Ocean conditions, forecast and tides for Yamagiri Maru

    Yamagiri Maru Ocean Conditions

    Monthly averages for Yamagiri Maru, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (7.41, 151.84) (2km away)

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    October Averages

    Sea Temperature

    30°C

    86°F · Range: 29.3–31.4°C

    Air Temperature

    28°C

    82°F

    Wind Speed

    6.4 m/s

    12.4 knots

    Atmospheric Pressure

    1009.4 hPa

    Based on 4 years of monitoring data · Data sources: Open-Meteo marine data

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