Conditions at Calais in December
December: Peak Size Meets Short-Period Reality
December ties January for the largest average surf of the year at about 3.5ft (1.1m), but the average period is only 5.2s. The wave rose remains dominated by SW and WSW at 15.0% and 13.5%, with the NNW window strong at 10.3%. The positive side is that the ideal offshore wind share ties the yearly maximum at 7%, offering more windows for clean, winter surf. Air temperatures average 6.5°C, water drops to 9.6°C, and precipitation is heavy at 2.71 mm/day. Expect fast-changing conditions: raw, windy, lumpy days followed by crisp offshore periods with clean, short-period waves.
Average Spot conditions at Calais in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Calais 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 Calais for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Calais 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 Calais.