Conditions at Portsalon in September
September: The Autumn Awakening
September is where the surf season starts to re-engage. Average swell height jumps back to 2.0m (6.6ft) and period to 10.1s, a clear sign that autumn low-pressure systems are returning to the North Atlantic. W and WNW remain dominant (21.3% and 20.5%), and for the first time since spring there is consistent 1.5-2.5m (5-8ft) energy in the water. The NNE-E window, though still a small slice (around 2.6%), is more likely to produce clean, long-period lines under offshore flow. Ideal winds sit at a solid 34%, and with water temperature still pleasant at 15.1°C and air at 12.4°C, this is often the most comfortable month for good surf.
Average Spot conditions at Portsalon in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Portsalon 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 Portsalon for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Portsalon 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 Portsalon.