Backdoor - surf spot statistics

Backdoor in the United States offers consistent surf year-round, but the best conditions typically occur during the winter months, from November through February. During this period, ground swell dominates (76-88% of the time) with mean swell sizes ranging from 1.7 to 2.0 meters, providing powerful and clean waves. The downside is that wind conditions are less favorable, with bad winds occurring 52-64% of the time, but when the winds align, the surf is exceptional. Late fall (October) and early spring (December) also see strong ground swells (72-85%) and slightly improved wind conditions (44-48% good winds), making them solid alternatives. The summer months (May-August) bring smaller swells, primarily wind-driven, with lower mean sizes (1.1-1.3m), though July and August see slightly better wind conditions (38-41% good winds). September stands out as a transitional month with improving ground swell presence (37%) and the best wind odds year-round (51% good winds), offering a balance between swell quality and cleaner conditions. Overall, advanced surfers will prioritize the winter swell power, while those seeking more manageable waves and fewer crowds might prefer late fall or early spring sessions.

September at Backdoor offers decent surf conditions with an average swell height of 1.2m and a solid period of 9.9s, providing well-organized and rideable waves. The majority of swells come from the NE, NNE, and ENE directions, with the highest frequency in the 1-1.5m range, ensuring consistent, mid-sized waves ideal for performance surfing. The wind is favorable 51% of the time, mostly light to moderate (0-20kph) from the NE, ENE, and E sectors, which helps maintain clean face conditions. However, larger swells (1.5-2m) are less frequent but can still deliver powerful, hollow sections when they arrive. Windier days with stronger easterly or northeasterly gusts may occasionally affect wave quality, but overall, September is a reliable month for surfers looking for manageable, punchy waves with decent shape.