Mundaka - surf spot statistics

Mundaka is a world-class left-hand river mouth wave that thrives on powerful, well-organized ground swell and favorable wind conditions. The data shows that the best months for surfing here are from October through March, when ground swell dominates (65-85% occurrence), mean swell heights range from 1.3m to 1.8m, and the likelihood of good wind conditions peaks at 30-31% (compared to the summer lows of 19-23%). Winter months, particularly December to February, offer the most consistent and powerful swells, though wind conditions remain challenging (69-72% bad winds). Spring and summer see a sharp decline in quality, with increasing wind swell dominance, smaller waves (0.8-1.2m), and worse wind odds (74-81% unfavorable). September marks the transition back to better conditions, while April through August are generally inconsistent due to higher wind swell influence and onshore winds. For experienced surfers targeting Mundaka's legendary barrels, the prime window is autumn through early winter when the Atlantic swell engine is most active and wind chances slightly improve, despite still being predominantly marginal. The spot's reliance on precise sandbar formation means these stats only tell part of the story, but the trend clearly favors late fall and winter for the biggest, cleanest sessions.

In September, Mundaka offers surfable conditions with an average swell height of 1.0m and a solid average period of 10.4s, indicating consistent, well-spaced waves. The dominant swell directions are from the NW, WNW, and NNW, providing the highest frequency of rideable waves—particularly in the 0.5-2.5m range, where the majority of swells fall. These directions account for the best energy delivery, with NW and NNW swells contributing significantly to waves between 1-2.5m. Wind conditions are favorable for surfing only 26% of the time, with lighter winds (0-20kph) most common from the N to NE sectors. However, stronger winds (20-40kph) occasionally come from the W to WNW, which can create choppier conditions. Overall, September sees a mix of small to medium-sized, clean waves when winds align, but surfers should monitor forecasts for optimal windows, as inconsistent wind quality can limit ideal sessions. The long-period NW-NNW swells remain the most reliable for quality rides.