Ishigaki & Yaeyama, Japan
    伊良部

    Nakanojima Channel

    Best months: Apr–Jun

    Protected Area

    伊良部

    Why dive here

    With 428+ marine species recorded in the area - including bull sharks, manta rays, mobula rays (devil rays), seahorses and sea turtles - Nakanojima Channel offers some of Ishigaki & Yaeyama's richest drift diving. Water ranges 23-30°C, warmest July, August, September.

    Best timeApr–Jun
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeBull Sharks, Manta Rays, Mobula Rays (Devil Rays), Seahorses and Sea Turtles · 428+ species recorded
    Water23-30°C · warmest July, August, September
    CharacterDrift dive
    StandoutExceptional marine biodiversity

    Nakanojima Channel, just off Ishigaki, is one of those sites that always delivers. We love drifting through here, letting the current do the work. It’s not just a pass through; the walls on either side are packed with coral. You’ll see big patches of Pachyseris, looking like giant overlapping plates, alongside brain root coral and smooth cauliflower coral. It's a great spot for macro life, too. Keep an eye out for those colourful bicolor nudibranchs clinging to the walls. We've found the current can pick up quite a bit, particularly around new and full moons, so it's a site that suits divers comfortable with a bit of movement. Visibility here tends to be consistently good, often pushing past 20 metres, so you get a great sense of the channel opening up before you. We'd suggest going in the late morning or early afternoon when the sun is high; it really makes the subtle colours of the corals pop.

    Safety Notes

    Drift dive - carry a surface marker buoy (SMB) and stay with your group. Brief the current direction before entry.

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    Conditions

    Ocean conditions, forecast and tides for Nakanojima Channel

    Nakanojima Channel Ocean Conditions

    Monthly averages for Nakanojima Channel, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (24.6, 124.35) (10km away)

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    October Averages

    Sea Temperature

    29°C

    84°F · Range: 27–30.4°C

    Air Temperature

    26°C

    79°F

    Wind Speed

    7.74 m/s

    15.0 knots

    Atmospheric Pressure

    1013.6 hPa

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

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