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Conditions at Praia da Cal in September
September: Biggest Swell, Tougher Winds
September is the month that makes you work for it. The average wave height peaks at the year's maximum - around 6ft (1.8m) - but the period tightens to 9.1s and ideal wind plummets to 31%. Swell direction is still favorable: ENE (18.9%), E (15.7%), ESE (13.9%), SE (13.6%), SSE (12.0%) and S (10.4%) combine for a relentless conveyor of energy, and the height tables are stacked with 5-8ft (1.5-2.5m) waves. This is the most powerful month on paper. However, the South Atlantic High is strengthening and the NE trade wind machine kicks into high gear: NE (20.3%), ENE (10.6%) and NNE (12.1%) dominate, while offshore WNW (1.5%), NW (1.6%) and NNW (5.1%) become scarce. Expect lumpy, wind-affected conditions more often than not, but when a cold front passes and the west wind arrives, Praia da Cal can be epic. Water is 17.1°C, air 15.8°C, and rain increases to 4.94 mm/day.
Average Spot conditions at Praia da Cal in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Praia da Cal 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 Praia da Cal for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Praia da Cal 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 Praia da Cal.