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Conditions at Chacahua in September
September: Tropical Cyclone Fuel and the Highest Average Swell
September produces the largest average swell height of the year at 5.6ft (1.7m), with an average period of 13.2s. The directional mix stays favourable, with SSW at 56.8%, S at 22.4%, and SW at 12.2%. SSW delivers 22.5% in the 3-5ft (1-1.5m) class and 29.8% in the 5-6.5ft (1.5-2m) class, with 4.4% in the 6.5-8ft (2-2.5m) range; S and SW add further heavy water, including small but noteworthy contributions above 8ft (2.5m). Ideal wind is still solid at 55%, but this is the height of the rainy season, with 8.50 mm/day of precipitation, and W/WSW flow becomes more common. Eastern Pacific tropical cyclones are the wildcard: their long-period SW swell can send Chacahua into overdrive, though surface conditions are often stormy. Water temperature sits at 29.6°C and air around 28.5°C.
Average Spot conditions at Chacahua in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Chacahua 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 Chacahua for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Chacahua 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 Chacahua.