Contreiras - surf spot statistics

Contreiras in Portugal is a consistent surf spot with reliable conditions year-round, though the best months for surfing are typically from October through March. During this period, ground swell dominates (77-92%), providing powerful, clean waves with mean swell sizes ranging from 2.0m to 2.6m. The winter months—November, December, January, and February—are especially favorable, with ground swell percentages above 89% and larger waves averaging 2.4-2.6m. However, wind conditions are less ideal in these months, with bad wind conditions (offshore or cross-shore winds) occurring 58-74% of the time, making clean surf sessions more sporadic but rewarding when conditions align. From April onwards, the swell consistency shifts, with wind swell becoming more prevalent, particularly from May to August (47-79% wind swell). Wave size decreases, averaging 1.3-1.7m, and the conditions become more suited to intermediate surfers. Summer months (June-August) see the smallest waves (1.3-1.4m) and higher wind swell influence, though wind conditions improve slightly, with good winds (offshore or light onshore) occurring 30-38% of the time. September marks the transition back to better swell, with ground swell rising to 58% and mean wave height increasing to 1.6m. The best overall balance of swell quality and wind conditions occurs in October, when ground swell returns strongly (77%), wave size increases to 2.0m, and good wind conditions peak at 42%, making it one of the most reliable months for surf. While winter delivers the biggest and most powerful waves, the higher likelihood of unfavorable winds means surfers must time their sessions carefully. For consistent, well-shaped waves with better wind odds, late autumn (October) and early spring (March) offer strong alternatives to the peak winter months.

In September, Contreiras offers solid surf conditions with an average swell height of 1.6m and a strong average period of 11.1s, indicating well-organized, powerful waves. The primary swell direction is from the north and northwest, with the highest frequency of rideable waves (1-2.5m) coming from NNW (20.48% in the 1-1.5m range and 13.86% in the 1.5-2m range). NW and N swells also contribute significantly, ensuring consistent wave energy. Wind conditions are favorable for surfing 35% of the time, with light to moderate winds (below 20kph) dominating, particularly from the north and northeast. However, stronger southerly and southwesterly winds occasionally create chop. The best sessions occur when offshore or light cross-shore winds align with the dominant NW-NNW swell, offering clean, hollow waves suited for intermediate to advanced surfers. Overall, September delivers reliable surf with good size and shape, though wind variability means timing is key.