Santa Comba seasonal overview
Best Surf Season (October - March)
Santa Comba is a north-facing stretch of Spanish coastline that lights up when the North Atlantic storm track shifts south. From October through March, the Bay of Biscay is constantly fed by powerful extratropical cyclones, sending consistent WNW/NW groundswell into the beach. Average swell heights run 2.2-3.0m (7.2-9.8ft) with periods of 11.3-12.9s, and offshore S to SW winds blow 29-32% of the time, especially during the passage of fronts and low-pressure systems. When the North Atlantic Oscillation is in a positive phase, the storm track is more zonal and the Bay of Biscay gets hit by a string of deep lows, delivering even more power to this coast. This is the prime window for the heaviest, most powerful and cleanest surf of the year, though water temperatures drop to 13-16C and a quality winter wetsuit is essential.
Fair Surf Season (April - June & September)
As the planet tilts toward summer, the North Atlantic storm track weakens and drifts north, and Santa Comba sees a noticeable drop in both swell height and period. April still offers average waves around 2.1m (6.9ft) at 10.9s, but by May and June sizes ease to 1.5-1.7m (4.9-5.6ft) and periods slide into the 9-10s range. The swell is still predominantly from the NW/NNW, but summer sea breezes and more frequent NE/ENE winds start to make conditions less consistent. September marks the beginning of the autumn transition, with average heights back to 1.7m (5.6ft) and periods stretching to 10.4s as the first Atlantic lows fire up.
Low Surf Season (July - August)
High summer is the quietest time at Santa Comba. The Azores High bulges over the region, suppressing the storm track and leaving the Bay of Biscay dominated by weak, short-period NW/NNW windswell. Average swell heights bottom out at 1.3-1.4m (4.3-4.6ft), periods sit around 8.8-9.1s, and the wind is favorable only 17-19% of the time. The prevailing NE/ENE trades and thermal sea breezes create more chop and cross-shore texture, so while you can find the occasional clean and rippable wave, it rarely gets serious. This is the summer flat spell before the ocean wakes up again.