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.

May in Mundaka offers generally moderate surf conditions with an average swell height of 1.0m and a solid period of 9.9s, indicating well-formed, rideable waves. The most dominant swell directions are NW (34.63% of all waves), NNW (44.34%), and WNW (12.28%), producing the best quality waves, particularly in the 0.5-2.5m range. The majority of swells fall between 0.5-1.5m, with larger sets (1.5-2.5m) occurring less frequently but still providing punchy, powerful waves when they arrive. Wind conditions are favorable for surfing only 23% of the time, with onshore and cross-shore winds (W, WNW, NW, and S directions) often blowing at 10-30kph, which can create choppier conditions. Light offshore or sideshore winds (N, NE) occasionally clean up the waves but are less common. While May isn’t peak season, experienced surfers can still score good sessions, especially on NW/NNW swells with periods over 10s and lighter winds. Expect smaller, more manageable waves compared to winter, but with fewer crowd pressures and occasional solid days when larger swells push through.