Ohama - surf spot statistics

Ohama Beach in Japan is primarily windswell-driven, with ground swells playing a minor role throughout most of the year. The best surfing conditions typically occur from July to November when ground swell contribution increases slightly, peaking in August at 29%. However, even during these months, windswell remains dominant. Swell size averages a modest 1.1m to 1.4m year-round, with the largest waves seen from December to March (1.4m–1.5m). Unfortunately, wind conditions are generally poor, with bad winds (onshore/cross-shore) prevailing 75–83% of the time across all months. The least unfavorable winds occur from June to August, particularly in July and August when good wind probability peaks at 23–25%. Early winter (December-January) offers slightly larger swells but suffers from consistently bad winds (80%). Late summer (August) presents the best compromise—marginally higher ground swell influence and slightly better wind odds, despite the small average wave size. Surfers should prioritize July–September for relatively cleaner conditions, though expectations should be tempered given the spot’s reliance on windswell and frequent onshore flow. Overall, Ohama is a low-consistency break with no truly elite months, requiring patience and flexibility to score decent sessions.

June at Ohama offers moderate surf conditions with an average swell height of 1.1m and a decent period of 7.9s, providing reasonably clean and rideable waves. The dominant swell directions are SW, ENE, and ESE, with SW producing the largest waves—peaking in the 1-2.5m range—though ENE and ESE swells also contribute frequently. Wind conditions are critical, with only 21% of days offering ideal offshore or light cross-shore winds (typically from the NE to SSE range). However, SW and WSW winds are more common and stronger, often blowing onshore at 20-30kph, which can degrade wave quality. The best sessions will likely come when ENE or NE swells coincide with lighter winds from the north or east. While not epic, June delivers rideable waves for intermediate to advanced surfers, particularly when wind and swell align favorably—expect smaller, more manageable waves early in the month and occasional punchier SW swell later.