Conditions at Somo in December
December: Winter Peak and Offshore Windows
December is the statistical peak of the surf year at Somo. Average swell height is 6-7ft (2.0m), average period is a strong 12.5s, and the ideal wind percentage for the month hits 55%, the highest of any month. The swell mix is classic winter: NW 35.6%, WNW 19.6%, and NNW 12.2%, with a healthy share of 5-8ft (1.5-2.5m) waves and plenty of bigger sets. What really sets December apart is the wind balance - southerly and SSW winds combine for over 26% of all observations, giving surfers more chances to catch big sets with clean, offshore faces. Air temps average 10.4°C, water temp cools to 14.3°C, and precipitation is high at 3.65mm/day. When the Atlantic storms are lined up and the wind clock turns south, Somo is one of the better winter waves in northern Spain.
Average Spot conditions at Somo in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Somo 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 Somo for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Somo 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 Somo.