Conditions at Cave in December
December: Peak Winter, Size and Raw Power
December closes the year at the peak of Cave's power window. The average swell height is 8.2ft (2.5m) with a 12.7s period, and the distribution shows a healthy spread of W, WNW and NW swell, including a real share of XL pulses above 8.2ft (2.5m). Ideal offshore winds from the E and NE quadrants blow 26% of the time, often in the wake of low pressure systems crossing the Bay of Biscay and Iberia. Air temperatures cool to 12.3°C, water temperature drops to 14.9°C and precipitation averages 2.69mm/day. This is winter. When the wind is from the NE and the Atlantic sends a clean, long-period swell into the southwest-facing beach, Cave can be truly world-class. Be ready for heavy currents, bigger surf and the occasional session that will test your nerve.
Average Spot conditions at Cave in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Cave 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 Cave for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Cave 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 Cave.