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Conditions at Costa Azul in September
September: Hurricane Season Meets the Wrong Swell Window
September is a month of extremes. The average swell height remains high at 1.2m (3.9ft) and the period is a solid 12.6s. However, the swell direction is even more complex, with S at 64.3%, SSW at 26.5%, and SSE rising to 5.7% - the highest of the summer. This creates a mixed sea where occasional SE pulses can occur (0.6% together with ESE 0.1%). The ideal wind percentage drops to 70%, the lowest since January, and onshore winds from the E/ESE/SE now account for nearly 12% of the time, reflecting the influence of tropical cyclones. Air temperatures are high (28.0°C, max 34.3°C), water 29.8°C, and rainfall is the highest of the year at 3.07 mm/day. The increased tropical activity can actually be a blessing: when the remnants of a hurricane track up the Baja coast, they throw ENE/ESE swell across the region. If such a pulse coincides with a W/NW offshore wind, Costa Azul can get the best waves of the entire summer.
Average Spot conditions at Costa Azul in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Costa Azul 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 Costa Azul for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Costa Azul 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 Costa Azul.