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Conditions at Cardoso in May
May: Peak S-Swell Season Arrives
This is where Cardoso turns the corner into its prime. The average wave period climbs to 9.8 seconds and the S/SSW/SW complex now accounts for nearly 25% of all swell energy - by far the highest of the year. S alone brings 19.4% of the spectrum, mostly in the 1.5-2.5m (5-8ft) range, and the occasional winter low can push waves well overhead. The average surf height is a solid 1.8m (6ft). NNE/NE offshore flow remains strong, with ideal conditions 33% of the time. The caveat is onshore SW/SSW winds, which spike to about 34% after frontal passages. Water temp drops to 20.9°C and air to 19.9°C. May is the month to chase those clean pre-frontal mornings as long-period energy hits a south-facing beach with intent.
Average Spot conditions at Cardoso in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Cardoso 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 Cardoso for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Cardoso 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 Cardoso.