Conditions at Bondi in September
September: Spring Swing and Solid South Swell
September is a transition month, but it still delivers high-quality Bondi surf. The average period eases slightly to 9.0s and average height holds at 5-6ft (1.6m), while the direction mix remains south-heavy: SSE (17.5 percent) and S (16.4 percent) dominate, with SE (10.8 percent) providing extra push. Offshore flow is still respectable at 30 percent, and the ideal-wind window ties for the best of the year at 37 percent. The key difference from winter is the return of NE/ENE trade-swell energy, which adds fun but less powerful peaks. Water temp is still cold at 18.4°C, air temps warm to 16.3°C, and rainfall stays low at 1.7mm/day. September is a great month to catch the tail end of the winter swell train - still consistent, still clean, and with the bonus of longer days and lighter winds.
Average Spot conditions at Bondi in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Bondi 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 Bondi for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Bondi 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 Bondi.