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.

January in Mundaka offers solid surf conditions with a mean swell height of 1.8m and a strong average period of 12.9s, indicating powerful, well-spaced waves. The dominant swell direction is from the NNW (32.5% of waves over 1m), followed by NW and WNW, which typically produce clean, well-formed waves at this break. Swell quality is best in the 1.5-2.5m range (22.3% occurrence), with 14.7% of waves exceeding 2.5m—offering challenging but epic sessions for advanced surfers. Wind conditions are favorable 30% of the time, with the most likely clean conditions occurring during northerly (N, NNE) or light easterly (E, ESE) winds. However, strong southerlies (S, SSW) bring onshore winds at 20-30kph+ (5.5-7.5% frequency), which can degrade conditions. Swell consistency is reliable, with only 2.6% flat days (waves under 0.5m). The combination of NW-NNW swells and light offshore winds creates the legendary hollow barrels Mundaka is known for, though winter swells can occasionally be too powerful for comfort. Optimal sessions occur when swell heights hit 2-2.5m with NW-NNW direction and light NNE winds.