Oceanside - surf spot statistics

Oceanside, USA, offers consistent surf conditions year-round, with ground swell dominating the majority of the time, peaking from May to September at 92–96%. However, the best surf months are typically late fall and winter—November through February—when ground swell remains strong (75–83%) and wind conditions improve slightly compared to summer. During these months, mean swell sizes hover around 0.8–0.9m, with offshore or lighter onshore winds more likely (37–40% good wind conditions). Summer (May–September) sees extremely reliable ground swell (95+%), but strong onshore winds prevail (bad conditions 76–79% of the time), making sessions challenging despite the consistency. Swell size drops marginally in summer (0.8m), and while there’s almost no flat days, wind quality is the limiting factor. Spring (March–April) and early fall (October) are transitional periods, with still-decent ground swell (83–89%) but worsening wind odds (70–75% bad winds). For the best balance of swell and favorable winds, target late autumn or winter, though summer can work if you prioritize wave frequency over wind conditions.

May in Oceanside offers generally manageable conditions for surfers, with an average swell height of 0.9m and a solid period of 14.8s, indicating consistent, well-spaced waves. The swell primarily arrives from the SSW (38.9% at 0.5-1m, 18.6% at 1-1.5m) and S directions, with occasional contributions from SW and W, providing varied but mostly clean setups. Larger swells (1.5-2.5m) are rare but possible from the W and SSW. Wind conditions are hit-or-miss—only 21% of the time are they ideal (likely light offshore or glassy), while onshore WSW and W winds (often 10-30kph) can create chop. Early mornings may offer cleaner sessions before winds pick up. Overall, expect mostly knee-to-chest-high waves with occasional overhead sets, best suited for intermediate surfers when winds cooperate.