Conditions at Brandon Bay in December
December: The Grand Finale
December is the high-water mark of winter. Average swell is 6ft (1.8m) with a 12.3 second period, and the waverose is full: W 25.7%, WNW 22.6%, WSW 13.4% and NW 8.9%. This is long-period, high-power groundswell generated by a string of intense North Atlantic cyclones. The bay becomes a serious big-wave venue whenever the swell direction holds in the W/WSW window. Wind is still the catch - SW (11.0%), WSW (10.1%), SSW (10.3%) and W (8.5%) dominate, while ideal offshore flow is 24 percent. But the rare cold, clear day with an easterly offshore wind will produce some of the glassiest and heaviest surf of the year. Water temperature is 9.0°C, air 8.4°C, and rainfall is 4.58 mm/day. December demands respect and warm rubber, but it rewards with pure North Atlantic power.
Average Spot conditions at Brandon Bay in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Brandon Bay 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 Brandon Bay for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Brandon Bay 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 Brandon Bay.