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Conditions at Santa Rosa in April
April: More Power, Fewer Windows
April marks the transition toward winter: the swell gets bigger, but the clean-window percentage drops to just 2%. Average wave height climbs to 1.7m (5.6ft) and the period stretches to 13.6s, at the top of the powerful long-period class. The direction becomes more focused - a remarkable 92% of the swell comes from the SSW, with only 5% direct SW. That means Santa Rosa is feeling a lot of refracted, angled groundswell rather than clean open-ocean west lines. S and SSW winds combine for around 86% of the time, often at 10-20kph, putting a persistent chop on the surface. Water cools to 17.5C, air temps sit near 19.9C, and precipitation remains negligible. The surf is strong and occasionally unruly; take the lump to find the beast.
Average Spot conditions at Santa Rosa in April
Swell history for April
Wind history for April
Swell quality
Analyze the groundswell consistency at Santa Rosa during April. 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 April.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Santa Rosa for April. 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.