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Conditions at Kalk Bay in September
September: Spring Swing and Mixed Signals
September is a true transition month. Average height eases to 2.7m (8.9ft) with period 12.1s - still plenty of power. Swell directions start to include more S at 6.5% and SSE at 1.8%, alongside SW at 17.8%, SSW at 11.0%, and WSW at 9.7%. The wind becomes more variable: SE is still the single most common direction at 17.4%, but NNW and NW each appear 11.3% of the time, and SSE is at 12.3%. Ideal wind drops to 17% as the Cape Doctor begins to reassert itself. Air temps rise to 13.4°C, water temp 15.2°C, and precipitation falls to 1.94mm/day. This is a month when the right swell direction - more S and SSE - can make Kalk Bay absolutely firing, but you need to be opportunistic.
Average Spot conditions at Kalk Bay in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Kalk Bay 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 Kalk Bay for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Kalk Bay 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 Kalk Bay.