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Conditions at San Onofre State Beach in July
July: Fun-Sized Summer Waves
July continues the summer pattern, with slightly smaller but still long-period swell. The average wave height is 3.3ft (1.0m) and the period is a solid 13.7s. The direction shifts even more squarely into the southwest window: SW leads at 47%, WSW 30%, and SSW 18%. That is a near-perfect match for San Onofre's exposure. Essentially all swell observations are contained within the 0.5-1m (2-3ft) and 1-1.5m (3-5ft) classes, with almost nothing above the 5ft mark. So this is high-quality, manageable summer surf, not heaving, heavy juice.
Wind remains the limiting factor. Ideal conditions come in at just 7%, and the W/SW/WNW sea-breeze complex dominates the afternoons. Onshore S through WSW winds total about 48%, while another 27% is straight W. The ocean warms quickly to 17.7°C, air temperatures reach 22.1°C, and precipitation stays minimal. July is a groveler's dream when the early-morning windows line up, but the summer onshore flow rarely lets you forget where you are.
Average Spot conditions at San Onofre State Beach in July
Swell history for July
Wind history for July
Swell quality
Analyze the groundswell consistency at San Onofre State Beach during July. 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 San Onofre State Beach for your next trip in July.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at San Onofre State Beach for July. 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 San Onofre State Beach.