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Conditions at San Augustin in September
September: Heavy, Storm-Built Swells
September shows the highest average swell height of the year at around 5-6ft (1.7m) and a solid period of 13.2s. The directional mix remains favorable: SSW at 53.7%, S at 24.0% and SW at 10.7%, with about 93% of the energy arriving from the SSE-SW window. The dominant size classes are 1-1.5m (3-5ft) and 1.5-2m (5-6.5ft), and the month's hurricane/tropical storm activity can push occasional sets into the 8ft+ (2.5m+) range along the south-facing coast.
The trade-off is the wettest, most unsettled weather of the year, with precipitation at 7.48mm/day. Ideal winds are still decent at 54%, with WNW, NW and NNW offshore breezes between tropical waves. Air temperatures average 28.7°C and water is warm at 29.6°C. Short-range timing is critical - if the wind goes offshore right after a passing tropical system, September can serve up XL, heavy waves with serious power.
Average Spot conditions at San Augustin in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at San Augustin 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 San Augustin for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at San Augustin 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 San Augustin.