Conditions at Foz do Arelho in May
May: Summer Wind vs. Atlantic Swell
May sees average wave heights fall to 6ft (1.8m) and average periods to 9.9s, signalling the final fade of consistent winter groundswell. The direction story is still good: NNW at 29.9 percent, NW at 28.4 percent and WNW at 17.4 percent supply the beach with clean-lined swell, but the wind story is not. Ideal offshore wind drops to 13 percent, while NNW wind balloons to 35.1 percent and N adds another 12.1 percent, making many days bumpy and hard to read. The rare E or SSE offshore window can turn the 1.5 to 2.5m waves into rippable peaks. Air temperatures climb to 16.3C, water matches at 16.3C, and precipitation falls to 1.65 mm/day. This is a transition month for small-wave boards and flexible expectations.
Average Spot conditions at Foz do Arelho in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Foz do Arelho 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 Foz do Arelho for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Foz do Arelho 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 Foz do Arelho.