25-40m
    Chuuk (Truk) Lagoon, Micronesia

    Unkai 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 - Unkai 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 · max 25-40m
    StandoutExceptional marine biodiversity

    The Unkai Maru, she's a different beast from some of the other deep boys in Chuuk. Sitting in shallower water, she’s a perfect warm-up, or a brilliant second dive, offering heaps of penetration for those qualified. We love dropping into her holds, finding stacks of ceramic tiles, rows of sake bottles, and even some small trucks and jeeps still lashed down. The light plays beautifully through the openings, illuminating the ghostly cargo, and honestly, the sheer volume of stuff still onboard is genuinely striking. Outside, the deck guns are crusted with corals, home to schools of snapper and barracuda. Look closely, and you’ll spot nudibranchs tucked into crevices. The shallower depth means longer bottom times, giving you plenty of opportunity to explore the bridge or the engine room – definitely don’t skip the engine room, it’s remarkably intact. It’s not just a history lesson; it’s a living reef too. Our pick for a less demanding, but still utterly compelling, Chuuk experience.

    Typical Unkai Maru Dive Profile

    10m20mSafety Stop0m25m 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 25m - 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.

    Today05:4017:4012h 0m daylightGolden hour 17:12

    Nearest Dive Centres to Unkai Maru

    Dive shops near Unkai Maru

    View all dive centres in Chuuk (Truk) Lagoon

    Reviews for Unkai Maru

    Sign in to write a review

    Conditions

    Ocean conditions, forecast and tides for Unkai Maru

    Unkai Maru Ocean Conditions

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

    ExcellentGreatGoodFairPoor★Best monthsThis month

    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

    Plan & book

    Ways to dive Chuuk (Truk) Lagoon, from day trips to liveaboards.

    Day trips & courses

    via GetYourGuide

    Guided dives, courses and snorkel trips with instant booking.

    Find dive trips in Chuuk (Truk) Lagoon

    Places to stay

    via Booking.com

    Hotels and dive resorts near Chuuk (Truk) Lagoon.

    Search stays in Chuuk (Truk) Lagoon

    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 Unkai Maru

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

    Back to Chuuk (Truk) Lagoon