Lower Trestles - surf spot statistics

Lower Trestles is a consistent surf spot with predominantly ground swell year-round, though the optimal conditions vary across seasons. The best months for surfing are typically from March through September, when ground swell occurrence is highest (82–96%) and swell size averages around 0.8–0.9m. However, wind conditions play a crucial role, with onshore winds (bad conditions) dominating most of the year. The most favorable wind conditions are found in September and October, when good wind percentages reach 40%, though even then, offshore winds remain a minority. Late spring and early summer (May–June) see the strongest swells (0.9m), but wind quality drops significantly (only 26% favorable). Winter months (November–February) offer slightly better wind ratios (32–36% good), but swell consistency and size decrease, with more no-swell or wind-swell days. Ultimately, September and October strike the best balance, combining reliable ground swells (89–95%) and the least unfavorable winds (40% good), while still maintaining decent swell heights around 0.7–0.8m. For surfers prioritizing clean conditions over raw swell size, these transitional months are the most dependable.

November at Lower Trestles typically offers surfable conditions with a dominant swell direction from the SSW and SW, which aligns well with the break. The average swell height is 0.7m with a solid period of 14.5s, indicating consistent, well-spaced waves. The majority of waves (47%) fall in the 0.5-1m range, while sizable swells (1-2m) appear about 6-7% of the time—offering punchier sections for advanced surfers. Wind conditions are favorable 34% of the time, with lighter offshore or sideshore breezes mostly from the NE to E early in the day before shifting W/NW in the afternoons. However, the downside is the prevalence of onshore W/SW winds at higher speeds (20-30kph) around 4-5% of the time, which can deteriorate quality. For best sessions, watch for SSW swells paired with morning NE/E winds—classic Trestles combo—though expect some smaller, weaker days given the high frequency of sub-1m waves. Overall, November is decent but not epic; patience and timing are key.