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Conditions at Cidreira in May
May: The South Atlantic Comes Alive
The best season begins in earnest in May. Cidreira's average wave period climbs to 9.7s - the highest of the year - while average swell height sits at 5.9ft (1.8m). The swell direction mix becomes more diverse and more powerful, with S (17.0%), SSE (14.2%), E (12.2%), ESE (11.8%), ENE (11.7%) and SE (11.0%) all contributing; this is a much more groundswell-rich spectrum than the summer months. Equally important, the ideal wind percentage jumps to 30%. NE winds drop from 24% to 19.7%, while W (10.2%), WSW (9.3%) and SW (6.9%) winds become common features of passing frontal systems. Air temperature averages 18.7°C and water temp cools to 19.8°C, so the ocean feels crisper and the surface tends to stay smoother. This is the month when the combination of longer-period swell and offshore wind windows starts delivering consistently fun, rippable waves.
Average Spot conditions at Cidreira in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Cidreira 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 Cidreira for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Cidreira 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 Cidreira.