Aterro - surf spot statistics

Aterro in Portugal offers consistent surf conditions throughout the year, but the best months for surfers typically fall between October and March. During this period, ground swell dominates, with percentages ranging from 62% in October to 89% in January, ensuring powerful and well-formed waves. The mean swell size is also most favorable, averaging between 1.3m and 1.7m, providing ideal wave heights for intermediate to advanced surfers. Wind conditions improve slightly in these months, with good wind days peaking at 43% in January and December, though offshore winds remain somewhat inconsistent. From April to September, conditions deteriorate as wind swells take over, reducing wave quality, and bad wind conditions dominate, often exceeding 70%. Swell size drops below 1.0m in summer, making it less reliable for serious surfers. While Aterro is surfable year-round, the winter and early spring months deliver the most consistent, high-quality waves with better wind alignment, making them the prime time for surfing at this spot.

October at Aterro offers decent surfing conditions with an average swell height of 1.3m and a solid period of 11.4s, ensuring well-formed waves. The predominant swell direction is from the WNW and W, contributing to the most consistent surf, particularly in the 0.5-2.5m range. While larger swells over 2.5m are rare, there’s a good mix of mid-sized waves (1-2m) that provide quality rides. Wind conditions are favorable 37% of the time, typically light to moderate from the NNE to ENE, which aligns well with the WNW/W swell for clean faces. However, stronger winds from the S/SSW can occasionally disrupt conditions. Overall, October delivers reliable surf with a mix of manageable and occasionally punchy waves, best suited for intermediate to advanced surfers when wind and swell align.