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Conditions at Santa Rosa in December
December: Holiday Swell with Lingering Wind
December rounds out the year with a return to more summer-like, albeit imperfect, surf. Average height settles at 1.5m (4.9ft) and the period at 12.8s, with the SSW direction still supplying 88% of the energy. The direct SW component edges back up to 10%, giving the beach a little more onshore-facing power. Wind statistics still show 0% ideal offshore flow, but the S/SSW coastal breeze tends to be lighter and more variable during the early morning hours, creating the best chance for a window of surfable texture. Water temps warm to 17.4C, air temps average 19.3C, and rainfall remains effectively zero. It's a month of fun, long-period waves - just be patient and read the wind.
Average Spot conditions at Santa Rosa in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Santa Rosa 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 Santa Rosa for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Santa Rosa 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 Santa Rosa.