Stockton - surf spot statistics

Stockton, United States, offers a mix of conditions year-round, but the best months for surfers typically align with increased swell energy, favorable wind conditions, and lower percentages of no-swell days. The data shows that September stands out as the prime month, with the highest ground swell contribution (18%), relatively lower wind swell dominance (60%), and the lowest chance of no swell (22%). Additionally, September has the best wind conditions, with 23% good winds—the highest of any month—and the mean swell size at 0.8m, providing decent wave power. March and October also present decent opportunities, with mean swell sizes of 0.8m and manageable wind conditions, though ground swell percentages are lower (9% and 11%, respectively). Late summer/early fall (August-October) generally provides the most consistent surf due to a balance of swell types and slightly improved winds. Winter months (December-February) suffer from poor wind conditions (over 85% unfavorable) despite some swell activity, while spring and early summer (April-July) see higher wind swell dominance but weaker overall conditions. For surfers prioritizing quality over frequency, September is the clear standout, offering the best combination of swell consistency, wave size, and wind conditions at Stockton.

April at Stockton offers generally small but surfable waves, with an average swell height of 0.8m and a decent period of 7.1s. The best swells come from the south/southeastern quadrants (SSE, SE, ESE, and S), with the highest frequency of rideable waves (0.5–1.5m) occurring from these directions—particularly SSE, which sees a notable 12.55% in the 0.5–1m range and 6.73% at 1–1.5m. Larger waves (1.5–2m) are rare but most likely from SE and ESE directions. Wind conditions are challenging, with only 16% of days offering clean offshore or light cross-shore winds (typically from the west or northwest). Onshore southerly/southwesterly winds are more common, bringing choppier conditions—especially S/SSW, which often see stronger breezes (10–30+ kph). For surfers, the best windows will be during SSE swells paired with lighter NW winds, though consistency is limited. Expect mostly smaller, weaker waves with occasional mid-sized days when wind cooperates.