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Conditions at Nuevo Vallarta in September
September: Tropical Storm Season Adds Power
September marks the first noticeable transition toward better surf. The average height moves back to 1.0m (3.3ft) and while the period drops to 13.1s, there is more energy in the bigger classes: 1.5-2m (5-6.5ft) swell appears at about 4 percent of readings and 2-2.5m (6.5-8ft) at 0.6 percent, the largest slice of overhead potential in the summer half of the year. Swell direction remains excellent, with SW at 54.6 percent, WSW at 22.7 percent, and SSW at 18.8 percent, so most of this energy is aimed right at the west-southwest-facing beach.
The trade-off is the weather. September is the wettest month, with 10.05mm/day of rain, and tropical storms can produce either surf or chaos. Ideal offshore winds are around 56 percent, with E/ESE flows common in the mornings before convection and W winds build. Air temperature averages 23.3°C and water temperature is 30.4°C. This is a high-reward month for storm-chasing surfers.
Average Spot conditions at Nuevo Vallarta in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Nuevo Vallarta 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 Nuevo Vallarta for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Nuevo Vallarta 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 Nuevo Vallarta.