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Conditions at Manuel Antonio in December
December: Small but Clean-The Dry Season Reset
December flips the script. The average swell height falls to 3.3ft (1.0m), and the average period drops to 12.1s, the shortest of the year. However, the wind picture improves dramatically as the dry season begins: ideal wind climbs back to 22%, with N-NE offshore flows accounting for 10.5% of all wind readings-about double the summer and autumn levels. The swell remains from the right directions, with SSW at 88.3% and SW at 11.0%, but much of it is in the 2-3ft (0.5-1m) range at 45.1%. Still, 49.2% of waves reach 3-5ft (1-1.5m), so there are clean, fun-sized gems, especially when an early-season southern pulse rolls through. With water at 28.1°C, air at 25.6°C, and rain dropping to 2.82mm/day, December is perfect for logging turns on a longboard or groveling on a shortboard.
Average Spot conditions at Manuel Antonio in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Manuel Antonio 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 Manuel Antonio for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Manuel Antonio 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 Manuel Antonio.