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Conditions at Chesterman Beach in September
September: First Cracks of Autumn
September is the transition month that saves the season. Average swell height rebounds to 1.5m (4.9ft), the period holds at 11.4s, and the swell spectrum is still firmly WSW and W. More importantly, the wind regime starts to shift: WNW remains common, but offshore E and ESE flow increases enough to push ideal surf conditions to 20%. Chesterman begins to wake up from its summer slumber, with cleaner morning sessions and more consistent stomach-to-head-high waves. Air temps remain pleasant at 13.5°C, water temp is still warm at 13.6°C, and rainfall climbs modestly to 3.21mm/day. It is an excellent month for catching the first proper swells before winter sets in.
Average Spot conditions at Chesterman Beach in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Chesterman Beach 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 Chesterman Beach for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Chesterman Beach 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 Chesterman Beach.