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Conditions at 8th Street Jetty in September
September: The Turning Point
September is when 8th Street Jetty starts to wake up from its summer nap. Average swell height rises to 3.6ft (1.1m), and the average period jumps to a year-high 8.3s - that extra second or two makes a huge difference on a jetty break. The optimal directional window is everywhere: E (15.5%), ESE (20.2%), SE (18.7%) and ENE (7.0%) combine for over 60% of the total, with ESE and SE delivering the cleanest lines. Offshore wind score sits at 40%, SSW (9.5%) and SW (7.1%) are still the summer holdovers, but WNW/NW/WSW produce enough clean windows. With water temps still at 21.6°C and air temps around 20.6°C, this is the last real chance for warm-water surfing. Climatologically, hurricane season peaks this month, so expect occasional long-period tropical groundswell wrapping into the Jetty with more power than anything since spring.
Average Spot conditions at 8th Street Jetty in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at 8th Street Jetty 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 8th Street Jetty for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at 8th Street Jetty 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 8th Street Jetty.