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Conditions at Cabo Blanco in December
December: The Magic Ratio Returns
December is the turning point. The average swell height drops to a very manageable 5.2ft (1.6m) with a powerful 13.9s period, and the directional spread becomes much more favourable for Cabo Blanco: SW and SSW each provide roughly 44-46%, WSW adds 8%, W adds 2%, and a touch of WNW appears. This is a healthier mix for the NW-facing break than the winter SSW monolith. Wind quality also improves dramatically, with ideal surfing wind at 38% - a big jump from October and November. S winds (40%) and SSW (31%) remain the most common, but velocities are more moderate, and SW (20%) and WSW (7%) contribute additional offshore/side-offshore flow. With water at 21.5°C, air at 22.9°C and precipitation at only 0.27 mm/day, December marks the start of the prime summer surf season at Cabo Blanco.
Average Spot conditions at Cabo Blanco in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Cabo Blanco during December. 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 Cabo Blanco for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Cabo Blanco for December. 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 Cabo Blanco.