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Conditions at Playa Ostional in December
December: Clean Winter Consistency
December marks the full return of the dry season and a shift toward a broader, more mixed swell spectrum. The NE trade wind re-establishes strongly (NE 44.5%, NNE 12.1%, ENE 11.5%), and ideal wind sits at a generous 58%. The bad onshore wind group is the lowest of the year at only 9%, making for clean, groomed surfaces. Wave height holds at 1.3m (4ft), though period slips to 11.7s as the dominant swell direction becomes more mixed. SSW still leads with 31.1%, followed by SW at 18.7%, but a significant spread of NW/N/NNE and E swell arrives from the North Pacific and local wind seas. Rain is almost gone at 0.70mm/day, air temp averages 27.1°C and water temp is 27.9°C. December offers user-friendly, sunny days with steady offshore winds and fun, hollow peaks, even if it lacks the raw power of mid-year.
Average Spot conditions at Playa Ostional in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Playa Ostional 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 Playa Ostional for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Playa Ostional 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 Playa Ostional.