Oshima Island

Oshima Island offers a raw, volcanic surf experience at a point break that is described as sheltered but also as sometimes exposed depending on the specific conditions. The spot is strongly associated with rocky hazards—sharp volcanic rock and other hazards like sea urchins—so careful lineup assessment and appropriate entry/exit planning are essential. Surfability is reported as intermittent and most consistent during summer swells, with August singled out as the best month. Conditions are described as best when a southerly to south-southeast swell comes together with offshore wind from the east. Even when waves show up, crowding is typically low, which can be helpful for surfers who need to wait for the right combination. Sea temperatures around the mid-summer peak are warmest later in summer (with winter much cooler), but the surfing window is still governed by the spot’s limited consistency. For larger systems, the wave can hold size yet becomes especially dangerous when currents are heavy—so larger, more powerful surf should be treated as higher-risk. Facilities are basic (with toilets, parking, and food options in towns), and rescue/lifeguard presence is not indicated for this launch. Plan for self-sufficiency: bring the right protective gear for sharp rock, and be prepared for stronger water movement during storm/typhoon periods.