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Conditions at Prainha in September
September: Maximum Size, Tricky Winds
September throws the biggest average swell of the year at Prainha, with wave heights around 1.8m (6ft) and a period of 9.1s. The swell is powerful and well-directed, with east-northeast at 18.9%, east at 15.7%, east-southeast at 13.9%, southeast at 13.6% and south-southeast at 12.0%. There is a real chance of solid overhead-plus days, but the wind is the wildcard. The northeast trade wind roars back, with northeast at 20.3% and east-northeast at 10.6%, dropping the ideal wind frequency to just 29%. Many waves end up bumpy and tricky. Water temperature is 17.1°C and air temperatures warm slightly to 15.8°C. September is a fair month, but when a front interrupts the trades, Prainha can be world-class.
Average Spot conditions at Prainha in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Prainha 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 Prainha for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Prainha 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 Prainha.