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.

In June, Aterro typically experiences modest but surfable conditions with an average swell height of 0.9m and a decent period of 9.6s, indicating relatively clean and organized waves. The swell direction is predominantly from the west-northwest (WNW), which accounts for the majority of rideable waves, particularly in the 0.5-1.5m range. Larger swells (1.5-2.5m) occur less frequently but are still present, mainly from the WNW and NW directions. Wind conditions are less favorable, with only 18% of days offering ideal offshore or light cross-shore winds for surfing. The dominant wind directions are from the north and northwest, often bringing onshore or cross-onshore breezes that can create choppier conditions. Surfers should expect smaller, more manageable waves with occasional clean sessions when winds align favorably, making June a decent but inconsistent month for surfing at this spot.