Conditions at Ohama in September
September: Peak East Swell and Typhoon Season Align
September is when Ohama really comes alive. The average height jumps to 5ft (1.6m), period is a robust 8.7s, and the swell direction flips to the optimal southeast and east quadrant: E at 16%, ESE at 13%, SE at 10%, and SSE at 10% combine for roughly 49%, with ENE adding another 13% of well-aligned east energy. This is exactly the kind of groundswell the SE-facing bight is built for. The major limitation is wind: NE at 26% and ENE at 18% dominate, and ideal wind drops to just 19%. This means September can be stormy-looking and sideshore, but every NE-onshore lull or offshore NW morning is a chance to capitalize on pumping, organized E/SE swell. Water temperature sits at a warm 26.1°C, air averages 25.0°C, and rainfall is high at 8.1mm/day, often in tropical bursts.
Average Spot conditions at Ohama in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Ohama 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 Ohama for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Ohama 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 Ohama.