Yerbabuena seasonal overview
Best Surf Season (October - March)
Yerbabuena enters its prime as the North Atlantic begins to spin up bigger, more organized low-pressure systems. Average wave heights climb into the 4-5ft (1.2-1.5m) range and periods lengthen past 10 seconds, giving the southwest-facing beach a powerful, rideable pulse. The most reliable sessions come when long-period W or WNW groundswell wraps into the bay, but the real standouts are the rarer S, SSW and SW swells that line up directly on the beach. These months also bring the highest percentage of offshore N to NNW winds, with January and December topping the annual list at 45% and 40% ideal wind respectively, so the surface stays glassy and the waves keep a clean shape. Throughout this period, the North Atlantic Oscillation is the main player: positive phases push strong westerly storm tracks over northern Spain, while negative phases can send lows further south and produce those S/SW swells that Yerbabuena looks like it was made for. Cooler water temperatures around 15-17°C accompany the more energetic conditions.
Fair Surf Season (April - May & September)
The storm track retreats north in spring, but April and May still receive enough Atlantic energy to produce fun, rippable conditions. Average heights ease to 3-4ft (0.9-1.2m) and periods hover around 8-9.5s, which is just enough for a grovel board and occasional punchy walls if a late-season low drifts through. September is the first month of the Atlantic waking up again after the summer lull, though average surf remains on the smaller side at around 3ft (0.9m). Wind quality drops in these transition months, with ideal offshore wind only 23-30% of the time, so it pays to be selective and pick the clean windows.
Low Surf Season (June - August)
Summer belongs to the Azores High. Yerbabuena goes quiet as average swell drops to 2.5-3ft (0.8-0.9m) and periods shorten to 6.8-7.4s, leaving mostly short-period WNW windswell that struggles to break cleanly on the beach. Meanwhile east and ESE winds dominate, and the percentage of ideal offshore wind falls to only 20-22%. It is not completely flat, and occasional small windows surface early in the morning before the thermal wind kicks in, but this is the low season for dedicated surfers. Water temperatures peak at 20.4-20.6°C, making it more of a swimming and sunbathing time.