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 January, Aterro, Portugal, offers solid surf conditions with an average swell height of 1.7m and a favorable wave period of 13.1s, providing well-organized and powerful waves. The swell is predominantly from the west (W) and west-northwest (WNW), making up the majority of surfable conditions, with wave heights frequently in the 1-2.5m range—ideal for intermediate to advanced surfers. Wind conditions are suitable 43% of the time, with lighter winds (0-20kph) coming mostly from the north, northeast, and east, which helps maintain clean faces. However, stronger winds (20-50kph) from the south and southwest can occasionally create choppier conditions. Overall, January delivers consistent, high-quality surf with a mix of medium to larger waves, though wind direction variability means surfers should monitor daily forecasts for optimal sessions.