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Conditions at Punta Banco in September
September: The Onshore Monsoon Grind
September is the toughest month at Punta Banco. The swell is still there - average 3-4ft (1.1m), period 13.2s - and the direction remains ideal, with SSW at 92.7% and a notable 7.1% from the SW, the highest SW contribution in months. Yet ideal wind collapses to 7%, the yearly low, while W-WNW flow dominates (WNW 25.7%, W 21.4%, WSW 16.3%). This is the classic onshore, stormy surface associated with a very active Intertropical Convergence Zone. Rainfall runs 8.76mm/day, air temperature cools to 25.2°C, and water temperature eases to 28.6°C. The energy is there, but the surfer who scores in September waits for a brief low-wind window and pounces before the monsoon swell turns to chop.
Average Spot conditions at Punta Banco in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Punta Banco 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 Punta Banco for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Punta Banco 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 Punta Banco.