Upper Trestles • Statistics for January

January: North Pacific Power Meets Glassy Mornings

January is a prime-time month for Upper Trestles. The average swell height checks in at 3ft (1.0m), the wave period sits at a solid 12.6s, and the wind is offshore-friendly 57% of the time, the second-best mark of the year. Swell energy is heavily weighted in the W window at 62.8%, with WSW adding another 25.2% and SW 6.8%. This is classic North Pacific groundswell, with the 2-3ft (0.5-1m) and 3-5ft (1-1.5m) classes dominating. While the direction is a touch west of the S-SW bullseye, the long period allows it to wrap efficiently into the SSW-facing banks and line up beautifully at Lowers. The wind profile is cold and offshore: NE accounts for 24.9%, NNE 10.1%, and ENE/N are present, giving clean conditions through dawn and often holding well into the day. Onshore S/SW flow is only around 20%, which is rare for this stretch of coast. Air temperatures average 13.2°C and water sits at 14.1°C, so throw on rubber. With 2.35 mm/day of rain, passing fronts can add extra energy and fresh sand, making January one of the most reliable months for quality waves.