Conditions at Ozaki in September
September: Lengthening Periods and Autumn Swell
September is a transition month where tropical and mid-latitude systems mix to create some of the cleanest long-period swells of the year. The average wave height remains solid at 1.0m (3.3ft), while the average period jumps to 9.3 seconds, giving the waves more push and organisation. The swell direction is beautifully aligned with the spot: ESE supplies 22.9%, SE 29.0% and SSE 22.1%, meaning the majority of energy is hitting the beach from the favourable eastern quadrant. The catch is that winds become more onshore from the NE and ENE, with NE at 17.5% and ENE at 13.5%, which is why ideal conditions drop to 16%. When a frontal system swings winds to the west or northwest, the combination of tropical-origin ESE/SE swell and offshore flow can create excellent, lined-up waves. Water remains warm at 27.6°C, air averages 25.1°C, and precipitation is still substantial at 8.52mm per day.
Average Spot conditions at Ozaki in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Ozaki during September. Based on historical data, there is a % probability of groundswell occurring this month. The chart below provides a detailed breakdown of the average wave height distribution, offering deep insights into the swell quality and surf potential you can expect at Ozaki for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Ozaki for September. Our analysis shows that favorable offshore or side-shore winds coincide with surfable swell approximately % of the time. The accompanying graph illustrates the average size distribution of waves during these optimal wind windows at Ozaki.