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Conditions at Cottosloe in August
August: Winter's Last Roar - Still Big, Wind Grittier
August maintains the winter size with average swell at 2.7m (8.9ft) and the longest average period of the year at 13.1s. SW swell returns to dominance at 31.9%, but WSW remains strong at 14.2%, with W at 2.9%. That gives Cottosloe a steady stream of powerful, well-refracted groundswell. The challenge is wind - ideal flow drops to 38%, and the wind rose is more scattered, with WSW (8.3%), W (7.3%), and WNW (7.4%) representing a considerable onshore threat. Yet the E and ESE directions (7.5% and 6.6%) still offer enough clean windows, especially during lighter mornings. Sea temp is at the coolest of the year, 18.2°C, and air hovers around 15.6°C. If you're willing to hunt through the fronts, there are still XL peelers to be had.
Average Spot conditions at Cottosloe in August
Swell history for August
Wind history for August
Swell quality
Analyze the groundswell consistency at Cottosloe 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 Cottosloe for your next trip in August.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Cottosloe 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 Cottosloe.