35-55m
    Expert
    Bikini Atoll, Marshall Islands
    Bikini

    HIJMS Nagato

    Best months: Jan–May

    Protected Area

    Bikini

    Why dive here

    With 266+ marine species recorded in the area - including blacktip reef sharks, giant moray eels, grey reef sharks, octopuses and pufferfish - HIJMS Nagato offers some of Bikini Atoll's richest wreck diving. Water ranges 28-30°C, warmest August, September, October.

    Best timeJan–May
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeBlacktip Reef Sharks, Giant Moray Eels, Grey Reef Sharks, Octopuses and Pufferfish · 266+ species recorded
    Water28-30°C · warmest August, September, October
    CharacterWreck dive · max 35-55m
    StandoutExceptional marine biodiversity

    The Nagato is a monster, a genuinely immense piece of history. We’re talking about the flagship of the Imperial Japanese Navy, the vessel from which Admiral Yamamoto ordered the attack on Pearl Harbor. Now she rests upside down, at about 52 metres, and the scale of the wreck is just humbling. It's not a dive for the faint of heart, or for anyone without solid wreck experience, a deep cert, and preferably, sidemount. Our favourite part has to be the huge bow section, a leviathan of steel covered in life. You drop down, and it just keeps going. Schools of barracuda hang off the structure, shimmering in the shafts of light that pierce the gloom. Look out for the gigantic four-bladed propellers, they’re still mostly intact and give you a sense of the sheer power this ship once had. Inside, the sheer scale of the engine room is incredible – a cathedral of twisted metal, now home to clouds of glasseye snapper and the occasional patrolling reef shark. You can spend an entire dive just on one section of the Nagato and still feel like you’ve only scratched the surface. The wreck is slowly but surely transforming into a thriving artificial reef, with blackfin squirrelfish darting between fire coral and the larger parrotfish grazing on the hull. We'd suggest staying shallow on your deco stops, exploring the upper sections of the superstructure which are now a maze of coral growth.

    Typical HIJMS Nagato Dive Profile

    15m30mSafety Stop0m35m max~20 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

    Deep dive (35m) - monitor air consumption closely. Advanced 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.

    Today05:4817:4411h 56m daylightGolden hour 17:16

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    Conditions

    Ocean conditions, forecast and tides for HIJMS Nagato

    HIJMS Nagato Ocean Conditions

    Monthly averages for HIJMS Nagato, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (11.58, 165.39) (4km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    30°C

    85°F · Range: 28.7–30.7°C

    Air Temperature

    28°C

    82°F

    Wind Speed

    7.91 m/s

    15.4 knots

    Atmospheric Pressure

    1010.4 hPa

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

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