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Conditions at Caswell Beach in December
December: The Winter Swell Engine Fires Up
December marks the return of proper midwinter conditions at Caswell. The average swell height rises to 5ft (1.5m), the average period holds at 10.0s, and the North Atlantic is stacked with low-pressure systems generating long-fetch groundswell. WSW/W still dominates around 54% of the time, but the south-to-southwest sector maintains a healthy 13% share, and strong post-frontal N/NNW winds can groom the lines into clean, powerful surf. Ideal offshore wind is only 12%, so patience is key in the short, dark days. Air temperatures average 6.7°C, water temperature sits at 10.3°C, and precipitation is high at 4.03mm/day. Christmas storms often deliver the heaviest swell of the year, making December a month to watch closely despite the cold and the ever-present wind challenge.
Average Spot conditions at Caswell Beach in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Caswell Beach 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 Caswell Beach for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Caswell Beach 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 Caswell Beach.