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Conditions at Gnaraloo in August
August: Peak Groundswell and Dawn Windows
August matches July for size and power-average wave height around 5-6ft (1.5-1.8m) and period at 14.1s-but the ideal wind percentage slips to 25%. The SW swell dominance is at its extreme, accounting for 64.3% of observations, with SSW adding another 22.1%. This is prime groundswell territory: solid 5-8ft (1.5-2.4m) sets are common, and enough period is present to keep the NW-facing spot alive even though the direction is not optimal. Wind is more southerly now-S 19.1%, SSE 21.8%, SE 14.8%-which is offshore but can get strong. Look for dawn sessions and light-wind windows between cold-front passages. Water temperature drops to its winter minimum of 22.3°C, air is 19.2°C, and rainfall is low at just 0.40 mm/day.
Average Spot conditions at Gnaraloo in August
Swell history for August
Wind history for August
Swell quality
Analyze the groundswell consistency at Gnaraloo during August. 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 Gnaraloo for your next trip in August.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Gnaraloo for August. 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 Gnaraloo.