Conditions at Pico Alto in September
September: Last Full Month of Winter Punch
September keeps the average swell height at a solid 6.2ft (1.9m) with a 12.9s period. SSW swell remains the dominant source at 73 percent, and S swell pushes to a seasonal high of 19 percent. The heavy distribution continues, with 40 percent in the 5-6.5ft (1.5-2m) range and 20 percent in the 6.5-8ft (2-2.5m) range. For surfers chasing size, this is the last full month of winter-level energy before the spring transition.
The wind story is unchanged: S and SSW winds combine for over 93 percent of the observations, and ideal offshore wind is absent. Water temperatures bottom out at 15.2°C, while air temperatures remain mild around 16.8°C. Despite the persistent onshore flow, the combination of consistent direction and long-period groundswell keeps September firmly in the premium window for Pico Alto.
Average Spot conditions at Pico Alto in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Pico Alto during September. 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 Pico Alto for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Pico Alto for September. 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 Pico Alto.