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Conditions at Ferrugem in September
September: Spring Shows Its Teeth
September is fickle but powerful. Average swell height reaches its annual peak at 5ft (1.5m), with period holding at 9.2s, but ideal surf wind drops to 50% as the trade-wind season re-establishes. Swell directions are excellent on paper: ENE 18.4%, E 20.8%, ESE 19.1% and SE 15.4%, with the 5-6ft (1.5-2m) class much better represented - especially from E and ESE. This is the month to watch for shoulder-to-head-high-plus waves.
The catch is wind. NNE jumps to 19.5%, NE to 8.4%, and the offshore WNW/NW signal shrinks. Clean conditions depend on a passing cold front or a high-pressure placement to the south that forces W/NW flow across the beach. When that happens, September can produce some of the best surf of the year; when it doesn't, the E/ESE swell is often bumpy and wind-blown. Water temp is 18.5°C, air averages 17.0°C, and rainfall rises slightly to 4.67 mm/day.
Average Spot conditions at Ferrugem in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Ferrugem 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 Ferrugem for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Ferrugem 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 Ferrugem.