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Conditions at Upper Trestles in October
October: Cleaner Winds and the First Real Winter Swells
October is the gateway to prime season. Average height still sits at 3ft (0.9m), the period is a solid 13.4s, and the seasonal wind shift becomes obvious: ideal offshore conditions now reach 35%, up from 22% in September. NE and NNE winds combine for about 17% of the wind distribution, while S/SSW/SW/WSW onshore flow drops back to near 38%. Swell direction is outstanding: SW 40.3%, WSW 36.0%, SSW 9.1% and W 14.0%, with most energy in the 2-3ft (0.5-1m) range and a healthy 3-5ft (1-1.5m) secondary peak. Water temp is still pleasant at 17.5°C, air averages 19.6°C, and rain remains modest at 0.47 mm/day. As the North Pacific storm track wakes up, October can deliver the first classic Lowers sessions of the season.
Average Spot conditions at Upper Trestles in October
Swell history for October
Wind history for October
Swell quality
Analyze the groundswell consistency at Upper Trestles during October. Based on historical data, there is a % probability of groundswell occurring this month. The chart below provides a detailed breakdown of the average wave height distribution, offering deep insights into the swell quality and surf potential you can expect at Upper Trestles for your next trip in October.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Upper Trestles for October. Our analysis shows that favorable offshore or side-shore winds coincide with surfable swell approximately % of the time. The accompanying graph illustrates the average size distribution of waves during these optimal wind windows at Upper Trestles.