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.

July at San Onofre typically offers small to medium-sized waves with an average swell height of 0.8m and a favorable long-period energy averaging 14.8s, which helps maintain shape and rideability. The swell predominantly arrives from the SSW (63.64% of waves in the 0.5-1m range) and SW (16.37% in 0.5-1m), resulting in consistent, mellow waves suitable for longboarding and relaxed surfing. Larger waves (1-1.5m) are less frequent (7.25% SSW, 2.13% SW) but still manageable for all skill levels. Wind conditions are variable, with only 26% of winds being ideal—typically light offshore or glassy mornings before weak onshore breezes (often WSW or W) pick up in the afternoon. Expect a mix of clean, small peelers early and slightly choppier conditions later in the day. While not a high-performance month, July delivers user-friendly waves with enough power for noseriding and flow, though advanced surfers may find it undersized. Watch for those less common SSW pulses over 1m for the best sessions.