Kerama Islands, Japan
    Keramashoto Coral Reef

    Ama Ushiji

    Best months: Jun–Aug

    Protected Area

    Keramashoto Coral Reef

    Why dive here

    With 369+ marine species recorded in the area - including barracuda, bull sharks, humpback whales, seahorses and sea turtles - Ama Ushiji offers some of Kerama Islands's richest diving. Water ranges 22-30°C, warmest July, August, September.

    Best timeJun–Aug
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeBarracuda, Bull Sharks, Humpback Whales, Seahorses and Sea Turtles · 369+ species recorded
    Water22-30°C · warmest July, August, September
    StandoutExceptional marine biodiversity

    Ama Ushiji isn’t just another Kerama site; it’s one of those places we return to repeatedly for a reason. Imagine the sunlight, bright and fractured, illuminating massive honeycomb and staghorn coral formations. We love drifting through the gaps, spotting leopard hinds peeking out, or just marveling at the sheer scale of the hard coral. The Chinese lettuce coral here grows in huge, undulating plates, creating these incredible, almost alien landscapes. Visibility here can be exceptional, often extending past 25 metres, especially around midday. It’s a site that rewards a slow pace. Don’t rush past the smaller stuff; the sebae anemones are always worth a closer look for their resident clownfish. For photographers, the interplay of light and shadow on the corals is a constant challenge and a huge draw. We’d suggest going on a sunny day to truly appreciate the colours.

    Today05:2817:0911h 40m daylightGolden hour 16:38

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    Conditions

    Ocean conditions, forecast and tides for Ama Ushiji

    Ama Ushiji Ocean Conditions

    Monthly averages for Ama Ushiji, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (26.24, 127.37) (1km away)

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    October Averages

    Sea Temperature

    29°C

    83°F · Range: 26.4–30.7°C

    Air Temperature

    26°C

    79°F

    Wind Speed

    9.4 m/s

    18.3 knots

    Atmospheric Pressure

    1014.4 hPa

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

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