Conditions at Cobden in September
September: Big Swells and a Windy Trade-Off
September brings the largest average swell height of the year - 2.1m (7ft) - with a period of 12.3s. The W-WNW-NW-NNW window becomes even more important, combining for over 43% of the spectrum, with W alone at 25%. However, the wind regime starts to deteriorate: ideal offshore wind drops to 46%, and onshore W-NW flow jumps back up to 30%. The ESE offshore component is still significant at 17.6%, but persistent westerly fronts begin to push across the Tasman, delivering swell with a raw, stormy edge. Water temp is still cold at 12.3°C, air averages 8.9°C, and rainfall is 5.61mm/day. Look for the windows between fronts - those are the moments when Cobden gets both size and glass.
Average Spot conditions at Cobden in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Cobden 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 Cobden for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Cobden 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 Cobden.