Conditions at La Source in September
September: The First Whiff of Autumn Groundswell
September marks the turning point as the average period climbs back above 10s to 10.1s and the average swell eases to just under 5ft (1.5m). The swell distribution is still heavily NNW at 74.0%, but NW jumps to 19.0% and WNW contributes 2.0%, hinting at returning Atlantic energy. Ideal wind is 53%, with more consistent NNE/E offshore mornings. Water temperature is at its warmest at 18.4°C, air temps range 17-34°C, and rain starts to pick up slightly at 0.19mm/day. The ocean is waking up; by the end of the month, the first proper W-groundswell windows can appear.
Average Spot conditions at La Source in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at La Source 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 La Source for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at La Source 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 La Source.