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Conditions at La Isla in September
September: The South Pacific High Tightens Its Grip
September continues the winter trend with an average swell height of 1.9m (6.2ft) and a 12.9s period. The SSW direction provides 73% of the energy, while S swell strengthens to 19%, giving the break more southerly character. Waves still arrive in healthy 5-8ft (1.5-2.5m) pulses, and the underlying power is enough to draw any surfer's attention.
Unfortunately, the wind remains the limiting factor. Ideal offshore flow is recorded 0% of the time, and S, SSW and SW winds cover 92% of the month. SW winds in the 10-20kph band are especially prominent, adding cross-onshore chop to an already wind-affected lineup. Only the briefest pressure-relief windows will offer truly clean conditions.
Air temperatures stay cool at 12.3-23.1°C, precipitation is nearly zero, and water temperature remains at 15.2°C. Bring the winter rubber and a willingness to fight for every wave.
Average Spot conditions at La Isla in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at La Isla 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 Isla for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at La Isla 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 Isla.