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.

November at Aterro offers decent surf conditions, with an average swell height of 1.5m and a solid period of 12.1s, which typically translates to well-organized, powerful waves. The dominant swell directions come from the W and WNW, making up the majority of the surfable waves, while NW and WSW swells also contribute occasionally. Most waves fall in the 0.5-2.5m range, providing a good mix of manageable and more challenging surf, with about 4-5% of days delivering overhead conditions (over 2.5m). Wind conditions are surfable 38% of the time, with favorable offshore or light cross-shore winds mostly from the NE, ENE, and E. However, stronger onshore winds from the WSW and W can occasionally disrupt conditions, especially later in the month. Overall, November is a reliable month for surfers who can handle mid-sized swells and prioritize mornings when winds are typically lighter. Intermediate to advanced surfers will find the best sessions when wind direction aligns with WNW/NW swells, offering clean, lined-up waves.