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Conditions at Hermanus in August
August: Still Heavy, But the Window Starts to Narrow
August maintains the winter swell-2.8m (9ft) average with 12.3s periods and 32% ideal wind-but a subtle drying and a slow return of SE winds begin to reduce consistency. NW (16.6%) and WNW (15.2%) remain strong offshore flows, and the W wind (10.0%) also helps, but E/ESE winds climb back to 11.8% and 7.3% respectively as spring approaches. Swell is still substantial, dominated by SW (18.2%) and WSW (9.2%), with SSW at 9.2% and S at 3.9%. The southern components, while not the largest percentage, are what make Hermanus really fire on the SSE-facing beach. Water remains at 15.0°C, air temps at 13.1°C. Look for cold-front windows where fresh NW winds precede light variable conditions and the long-period SSW/S swells wrap into Walker Bay with shape.
Average Spot conditions at Hermanus in August
Swell history for August
Wind history for August
Swell quality
Analyze the groundswell consistency at Hermanus 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 Hermanus for your next trip in August.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Hermanus 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 Hermanus.