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Conditions at Abrolhos Islands in September
September: Late Winter Power with Spring Edges
September is the tail end of the prime window, and it still delivers. Average swell height stays at a meaty 2.7m (9ft) with an average period of 13.7s. SW swell remains the dominant source at 24.7%, with SSW at 15.9% and WSW adding 3.6%. The swell window is still full of Southern Ocean energy, and the 1.5-2.5m (5-8ft) range is packed with quality wave heights.
Wind is where the transition begins. SSE winds rebuild to 18.2% and S winds to 15.8%, while ideal offshore wind drops to 9% of the time. The clean windows are still there, but they become more weather-dependent than in July and August. Watch for strong frontal passages that bring both swell and wind, and pick the days when a high-pressure system trails in with light offshore flow. Water temperature falls to 20.5°C, air temperature averages 18.3°C, and rainfall drops to 1.10 mm/day.
Average Spot conditions at Abrolhos Islands in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Abrolhos Islands 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 Abrolhos Islands for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Abrolhos Islands 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 Abrolhos Islands.