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Conditions at Petacalco in May
May: The Swell Machine Turns Up
May is the beginning of prime south swell season. Average swell height sits at 1.4m (4.6ft), the average period peaks at 14.1s, and the SSW direction accounts for a towering 86.4% of all wave energy. This is a month of very consistent, long-period SSW groundswell, with the bulk of the surf in the 1-1.5m (3.3-4.9ft) fun-to-solid range and just over 23% of waves reaching 1.5-2m (4.9-6.6ft) firing territory. The tradeoff is that only 49% of wind observations are ideal; SW winds increase with the heating of the land, so go early for clean conditions. Rainfall starts to increase slightly at 0.70mm/day, air temperatures average 27.6°C, and water temperature climbs to 28.7°C.
Average Spot conditions at Petacalco in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Petacalco during May. 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 Petacalco for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Petacalco for May. 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 Petacalco.