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.

December at Ozaki offers surfable conditions, though with some variability. The average swell height is 1.1m with an 8.4s period, providing decent energy for intermediate surfers. The predominant swell directions are from the ESE (14.21% of waves in the 0.5-1m range) and E (6.00% in 0.5-1m), delivering cleaner, longer-period waves ideal for surfing. However, the W and WSW directions also contribute surfable waves (1.5-2.5m range), though these can be more challenging due to wind interference. Winds are favorable for surfing only 19% of the time, with lighter offshore or cross-shore winds mainly from the E and ESE. Stronger onshore winds from the NW, WNW, and N can disrupt conditions, especially when paired with larger swells. Overall, December sees a mix of rideable days, best when ESE or E swells coincide with lighter winds—expect shoulder-high waves with occasional overhead sets during larger swells. Wind management is key, as westerlies often degrade quality.