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.

February at Lower Trestles offers relatively consistent but smaller conditions, with an average swell height of 0.8m and a strong average period of 13.9s, indicating clean, well-spaced waves. The swell direction is predominantly from the SSW, SW, and WSW, with the majority of waves (around 80%) falling between 0.5m and 1.5m—ideal for performance surfing. The wind is surfable 36% of the time, with offshore or light cross-shore winds (N, NE, E, and SE) occurring frequently enough to provide clean faces. However, stronger onshore winds (WSW, W) can occasionally disrupt conditions. While bigger swells (1.5m+) are rare (under 5%), the spot still delivers quality sessions, especially on mid-period SSW/SW swells with favorable winds. Advanced surfers will find the most potential, though larger winter swells are infrequent this month.