Conditions at Agua d'Alto in December
December: Peak Winter Power
December is the most powerful month of the year at Agua d'Alto. The average swell peaks at 2.8m (9ft) and the period holds at 12.1s, with a substantial cluster of observations in the 2-2.5m range and a healthy slice of over-2.5m groundswell. The direction tables still favor NNW (11.4%) and NW (9.2%), but the S, SSW, SW and WSW directions together contribute their highest share of the winter, bringing the kind of long-period southwest swell the beach is built for.
Wind remains the wildcard: ideal offshore N/NNE/NE/ENE windows are only 22% of the time, and the onshore SW (9.8%), WSW (9.1%) and SSW (8.1%) directions dominate the wind rose. Active, stormy weather is the norm-air temperatures average 16.8°C, water temperature is 17.7°C, and precipitation is the highest of the year at 3.16 mm/day. The reward for picking the offshore windows is heavy, pumping, occasionally epic surf to close the calendar year.
Average Spot conditions at Agua d'Alto in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Agua d'Alto 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 Agua d'Alto for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Agua d'Alto 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 Agua d'Alto.