Ozaki - surf spot statistics

Ozaki, Japan, offers surfable conditions year-round, though the best months for quality waves and favorable winds are typically from July to November. During this period, the swell consistency improves, with ground swell percentages rising significantly in August (29%) and remaining strong through September (27%) and October (25%). These months also bring larger mean swell sizes, averaging 1.5m to 1.6m, providing more powerful and cleaner waves compared to the rest of the year. Wind conditions are most favorable in July and August (29% good winds), though they start deteriorating by September (18%). Early winter months like December and January see smaller swells (1.1m) and poor wind conditions (81-84% bad winds), making sessions less reliable. Spring and early summer (May-June) have high wind swell dominance (90-93%) but suffer from onshore winds 75% of the time, leading to choppy surf. While Ozaki can work in winter, the autumn months—particularly August to October—deliver the best combo of swell size, ground swell contribution, and manageable winds.

In September, Ozaki offers fairly consistent surf with an average swell height of 1.6m and a decent period of 9.3s, providing good energy for rideable waves. The predominant swell direction is from the east-southeast (ESE), contributing to well-organized waves, particularly in the 1-2m range, which makes up a significant portion of conditions. Wind conditions are critical, and while only 18% of the time is ideal (typically light offshore or sideshore winds from the west or northwest), the data shows that stronger onshore winds from the northeast and east are more common, potentially disrupting wave quality. Surfers should target days with ESE swell and lighter winds for the best experience. Overall, September provides workable surf, but optimal sessions depend heavily on wind alignment.