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Conditions at La Jolla in September
September: Two Dominant Swell Windows
September is a transition month with a near-even split between S (43.6 percent) and SSW (43.4 percent) swell. Interestingly, a small amount of SW energy also appears, making it one of the closer months to the preferred WSW/W window of this spot. The average period remains solid at 13.3s, the average height is around 4.5ft (1.4m), and the ideal wind percentage improves slightly to 52 percent. This makes September a genuine fair-season month with more clean windows than July or August.
Wind flow becomes a little more varied, with strong N/NNE proportions decreasing and more SW/WSW/W breeze in the mix. Water temperature is still warm at 29.8°C, air temperature averages 25.3°C, and precipitation is high at 6.63mm/day due to lingering tropical moisture. Early autumn tropical cyclones in the Eastern Pacific can also add extra life to the S/SSW swell field. When the rain clears, September can serve up lined-up, long-period surf.
Average Spot conditions at La Jolla in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at La Jolla 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 Jolla for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at La Jolla 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 Jolla.