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Conditions at Still Bay in September
September: Spring Transition and Still Plenty of Punch
September is a true shoulder month. The ocean still carries solid winter structure - average height 2.2m (7.2ft), average period 11.6s - but the synoptic pattern is shifting. SW (24.8%) and SSW (22.2%) remain the dominant swell directions, with S (9.6%) and SSE/SE adding another 12.4%. The wind, however, becomes more problematic: W and WSW flow increases, and the ideal wind percentage falls back to 35%. Those westerly winds are not offshore for Still Bay's SSE exposure, and they can put a lumpy texture on the faces between frontal passages. The best windows are the days when a slow-moving high pressure system sets up over the interior, allowing N-NNW winds to blow offshore while the fading winter swell still rolls in. Water temp begins to climb at 15.7°C, and the lighter rainfall of 0.72mm/day hints at the coming spring.
Air temperature rises to 15.6°C, so the cold-season rubber is starting to feel a little warmer.
Average Spot conditions at Still Bay in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Still 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 Still Bay for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Still 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 Still Bay.