Seal Beach, located in Southern California, offers relatively consistent but small surf throughout the year, with ground swells being the primary swell source. The best months for surfing tend to be from May through September when ground swells are most frequent, peaking at 60-61% in May and August. During this period, the likelihood of no swell drops to around 33-38%, meaning more rideable days. However, the mean swell size remains modest at 0.6m, indicating mostly small to medium conditions suited for beginners and longboarders. Wind conditions are generally unfavorable year-round, with bad winds (onshore or strong cross-shore) dominating 80-89% of the time. The least windy months are June and July, but even then, only 11% of days have good offshore winds. The swell quality deteriorates from October to December, with ground swells dropping below 40% and no-swell days increasing to 59-64%. Winter months also see slightly smaller swells (0.5m) and persistently poor wind conditions. Overall, Seal Beach is most reliable in late spring and summer, though surfers should expect smaller waves and mostly challenging wind conditions. The spot is ideal for those seeking mellow waves rather than powerful breaks, with the best window being May to August when ground swells are most consistent.