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Conditions at Morro dos Conventos in September
September: Biggest Swells, Toughest Wind
September is the statistical peak of the swell calendar: average height reaches 1.7m (around 5-6ft) and the period is a respectable 9.4s. The directional spread is broad from ENE through SSE, with E and ESE each pushing 17-18% and SE at 16%. More importantly, a significant chunk of the S and SSE energy falls into the 2-2.5m class, so when it hits, it is pumping - sometimes heavy and top-to-bottom.
The wind, however, is the great equalizer. NE winds account for a massive 30% of the observations, and ideal offshore wind drops to just 15% - tied for the lowest of the year. This is the classic 'all dressed up with nowhere to go' month: plenty of size, but short windows of clean conditions. As the low pressure systems move through, the W/NW clears are short and often followed by SSW/SW onshore. Water temp starts its spring rise at 17.5°C and rainfall increases to 4.7mm/day. Patience is the key.
Average Spot conditions at Morro dos Conventos in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Morro dos Conventos 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 Morro dos Conventos for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Morro dos Conventos 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 Morro dos Conventos.