Conditions at Prainha in December
December: Peak North Atlantic Power
December caps the year with prime winter conditions. Average swell height is 9ft (2.7m), period is 12.8s, and ideal wind percentage peaks at 41 percent. The wave rose remains dominated by NW (18.6 percent) and WNW (13.2 percent), with NNW (10.4 percent) close behind and true west (5.5 percent) adding good shape. This is the month for maximum power: frequent 8ft-plus (over 2.5m) swells, heavy takeoffs and raw Atlantic conditions on the west coast.
Air temperatures fall to 13.0°C, water to 15.0°C, and precipitation is 2.93mm/day. The winter sun is low but the surf is high; when a high-pressure ridge settles in after a passing low, Prainha can be world-class.
Average Spot conditions at Prainha in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Prainha 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 Prainha for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Prainha 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 Prainha.