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.

September at this surf spot offers generally manageable conditions for experienced surfers, with an average swell height of 0.8m and a solid period of 14.9s, indicating consistent, well-spaced waves. The dominant swell directions are SSW (48.18% in the 0.5-1m range) and SW (26.42% in the same range), producing clean, angled waves that should work well with the beach's orientation. While larger waves (1.5m+) are rare (only 0.16% from SSW), the majority of swells fall in the 0.5-1.5m range, offering rideable shoulders and occasional punchy sections. Wind conditions are the main variable, with only 30% of days providing ideal offshore or light cross-shore winds—typically mornings before WNW or NW winds pick up (6.44–6.67% frequency at 10-20kph). Afternoons often see W/SW winds strengthening into the 10-20kph range, causing chop. Watch for rare S/SSE wind episodes (1.53% at 10-20kph) that could spoil an otherwise clean setup. Overall, September delivers decent mid-sized swells with morning sessions being the most reliable for quality rides.