Conditions at Zurriola in January
January: Peak Winter Power
January is the statistical apex of the surf year at Zurriola. Average swell heights peak at 2.1m (7ft) and the average wave period of 12.7s brings powerful, long-period groundswell thundering into the Bay of Biscay. The swell window is dominated by the northwest quadrant: NW swell accounts for 28.3 percent and WNW another 25.8 percent, with 7.9 percent from the NNW. What keeps the quality high is the wind. January is one of the best months for clean offshore flow - S and SSW winds blow a combined 30.5 percent of the time, and with SW and WSW added in, the ideal wind score reaches 43 percent. This is the classic cold-front pattern: low pressure rolling east across the Atlantic sweeps its trailing southern winds straight down the face. The main threat comes from the W-NW quadrant (WNW 8.3, NW 6.1, NNW 6.6), which can flip the beach into full onshore chaos. With air temps averaging 9.1°C and water temperature at 13.2°C, you will need full winter rubber - but when a 20kt SW wind meets a 12-13s NW swell, Zurriola dishes out some of the heaviest, hollow beachbreak lefts and rights you will find in Spain.
Average Spot conditions at Zurriola in January
Swell history for January
Wind history for January
Swell quality
Analyze the groundswell consistency at Zurriola during January. Based on historical data, there is a % probability of groundswell occurring this month. The chart below provides a detailed breakdown of the average wave height distribution, offering deep insights into the swell quality and surf potential you can expect at Zurriola for your next trip in January.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Zurriola for January. Our analysis shows that favorable offshore or side-shore winds coincide with surfable swell approximately % of the time. The accompanying graph illustrates the average size distribution of waves during these optimal wind windows at Zurriola.