Isla de Santa Marina - surf spot statistics

Isla de Santa Marina in Spain offers surfable conditions year-round, but the best months for experienced surfers are typically from October through March. During this period, ground swell dominates (65–85% of the time), providing cleaner, more organized waves with mean swell heights ranging from 1.5m to 2.0m—ideal for performance surfing. Winter months (December–February) bring the largest swells (1.9–2.0m), though wind conditions are less favorable (only 25–29% good wind days), often creating challenging cross-shore or onshore winds. Autumn (September–November) and early spring (March) strike a balance between decent swell size (1.5–1.8m) and slightly improved wind chances (31–35% good winds). From April to August, conditions deteriorate for high-performance surfing. Swell consistency drops as wind swells become more prevalent (37–73% of the time), and mean swell height falls below 1.4m, often resulting in weaker, less powerful waves. Summer months (June–August) see the smallest swells (~1.0m) and persistent poor wind conditions (68–70% bad winds), making it a better time for beginners or longboarders. September marks a transitional month, with improving ground swell (47%) and marginally better winds (35% good), offering a preview of the coming winter season. For serious surfers, prioritizing late autumn to early winter will yield the most powerful waves, despite wind challenges, while those seeking a compromise between swell and wind might prefer March or October.

December at Isla de Santa Marina offers solid surf conditions with an average swell height of 1.9m and a favorable wave period of 12.4s, indicating well-formed and powerful waves. The dominant swell directions are from the NW, WNW, and NNW, which produce the most rideable waves—particularly in the 1-2.5m range, making up a significant portion of the swell distribution. These swells are clean and consistent, though wave quality can vary depending on wind conditions. Wind is a mixed factor; only 28% of the time is it ideal for surfing (likely light offshore or sideshore winds). The most problematic winds come from the S, SSW, and W directions, which can be onshore and choppy at higher speeds, especially in the 20-40kph range. However, when winds are lighter or from favorable directions, the spot can be excellent. Overall, December delivers good surf with powerful, long-period swells, but wind conditions are inconsistent. Surfers should target days with NW-NNW swell and lighter winds for the best sessions.