Conditions at Foz in December
December: Winter Solstice Swell
December closes the year with winter muscle. Average swell heights remain at 1.6m (5.2ft), but the period extends to 12.3s, so the waves arrive with extra push and organization. NW (33%) and NNW (21%) are joined by a larger WNW contribution (14%) and more westerly energy (3%), making the entire western swell window extremely active. SSW winds dominate at 24%, with SW at 15%, keeping the offshore quadrant around 51% and ideal conditions 42% of the time. That is a recipe for grinding, well-shaped winter surf. Rain is frequent at 3.9mm/day and air temps sit at 7.7°C, but the ocean still holds 14.2°C. December is raw, committed and rewarding - if you can handle the cold, Foz rewards you with some of the best waves of the year.
Average Spot conditions at Foz in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Foz 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 Foz for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Foz 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 Foz.