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.

February at this surf spot offers decent conditions for experienced surfers, with an average swell height of 1.7m and a solid 13.0s period, providing well-formed, powerful waves. The swell is predominantly from the west (W, WSW, WNW), contributing to clean, organized waves, especially in the 1-2.5m range, which makes up a significant portion of the swell distribution. Offshore or light winds occur 39% of the time, primarily from northerly directions (N, NNE, NE), which helps maintain clean surf. However, moderate to strong onshore winds (E, ESE, SE) can occasionally disrupt conditions. Winds are most frequently light (0-20kph), but stronger gusts (20-50kph) from various directions can occasionally reduce quality. Overall, February delivers consistent swells with good power and occasional clean conditions, but wind variations mean selectivity is key for the best sessions.