San Onofre State Beach - surf spot statistics

San Onofre State Beach offers consistent surf conditions year-round, with some months standing out as particularly favorable for surfers. The best time to surf here is generally from April to September, when ground swell dominates (90-96% of the time) and wind swell remains minimal (2-6%). During this period, wave quality is reliable, with mean swell sizes hovering around 0.8-0.9m, providing manageable and rideable waves. The downside is that onshore winds (bad conditions) are frequent, peaking at 77% in May, making early mornings or late evenings ideal when winds are lighter. September and October bring slightly improved wind conditions (36-38% good winds) while maintaining strong ground swell presence (89-95%), making them prime months for cleaner waves. Winter months (November-February) see a drop in ground swell consistency (60-74%) and increased no-swell days (16-31%), though February still maintains decent swell size (0.8m). Wind conditions remain challenging year-round, but the fall transition (September-October) offers the best compromise between swell consistency and cleaner winds. For surfers prioritizing wave regularity over wind conditions, late spring to early fall (May-August) is optimal, while those seeking fewer crowds and a chance for better winds should target early fall.

April at San Onofre State Beach offers generally manageable conditions for surfers, though not always ideal. The average swell height is 0.8m with a long-period 14.9s, typically producing clean, well-spaced waves that favor mellow, smooth rides—perfect for longboarding or relaxed sessions. Swells predominantly arrive from the SSW (49.5% of waves in the 0.5-1m range) and SW (16.8% in 0.5-1m), with occasional larger sets up to 2.5m from the WSW and W, but these are rare. The wind is the limiting factor: only 28% of the time is it favorable for surfing, with light onshore (SSW, SW) or cross-shore breezes being most common. Stronger winds (20-30kph) from the WSW and W can disrupt conditions, especially in the afternoons. Early mornings often provide the cleanest windows. While not the most powerful or consistent month, April can still deliver fun, user-friendly waves for those chasing a more forgiving session.