Seal Beach - surf spot statistics

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.

January at Seal Beach typically offers surfable conditions, though with some variability. The average swell height is modest at 0.6m, paired with a solid 14.2s period, suggesting well-spaced, albeit smaller waves that can still provide clean, ridable shoulders. The majority of swells come from the SSW, SW, and W directions, with the most consistent waves falling in the 0.5-1m and 1-1.5m range—ideal for intermediate surfers. Larger swells (1.5m+) are rare but possible, particularly from the SW and W, offering occasional punchier sections. Wind conditions are a mixed bag, with only 20% of days providing ideal offshore or light cross-shore winds (typically from the NE or E). Onshore winds from the WSW and W are more common, which can create choppy or less clean conditions. Overall, expect smaller but rideable waves, best in the morning before winds pick up, with the occasional clean, mid-sized day when wind and swell align. Patience and timing will be key for scoring the best sessions.