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.

June in Oceanside sees a mix of small to mid-range surf with an average swell height of 0.9m and a solid period of 15.0s, offering some quality rides when conditions align. The swell primarily comes from the SSW (40.83% in the 0.5-1m range) and SW (23.72%), providing decent consistency. Larger waves (1-1.5m) are most frequent from the SSW (15.28%) and SW (3.31%), with occasional 1.5-2m sets, though these are rare. Wind conditions are only ideal 21% of the time, with the worst offenders being onshore WSW and W winds (frequently 10-20kph), which can create chop. When winds are light—particularly from the ENE, E, or SE—conditions clean up nicely. Overall, expect smaller but rideable surf with periods of glassy conditions, though wind interference is common. Patient surfers will find fun sessions, especially early mornings before the breeze picks up.