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Conditions at Yzerfontein in September
September: Spring Transition, Less Consistency
September brings spring transition. Average swell drops slightly to 8ft (2.5m), period remains 12.2s, and ideal wind falls to 21%. Swell remains plentiful from SW (24%), SSW (14%) and WSW (12%), so the ocean is still full of energy. The wind, however, begins reverting to the summer pattern: S jumps to 21%, SSE to 17%, SSW to 8%, while offshore N/NE flow shrinks to a minor slice. Water begins warming to 15.0°C, air averages 14.7°C, and rainfall drops to 1.20mm/day. Expect good size but more mixing and chop; the best windows are often early before the sea breeze kicks in.
Average Spot conditions at Yzerfontein in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Yzerfontein 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 Yzerfontein for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Yzerfontein 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 Yzerfontein.