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Conditions at Plettenberg Bay in September
September: Spring Swings Between Power and Onshore Drift
September is a transition month with a high ceiling. The ocean still has plenty of winter left in it: average swell height is 2.4m (8ft), period is 11.8s, and ideal winds are 44%. SW (24.3%) and SSW (19.2%) continue to dominate the swell direction spectrum, with S (9.0%) and a growing SSE/SE component (9.6%) beginning to add more east in the swell. The warning sign is wind: the E/ESE onshore share nearly doubles from winter levels to around 19%, so afternoon surface quality becomes more inconsistent. Early mornings with W/WSW offshore flow will still produce powerful, clean, head-high-to-overhead waves, but by midday the spring sea breeze often puts the chop on. Air temps warm to 14.7°C and water is 16.6°C. September is a fair season month that rewards early rising and a close eye on local wind forecasts.
Average Spot conditions at Plettenberg Bay in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Plettenberg Bay 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 Plettenberg Bay for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Plettenberg Bay 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 Plettenberg Bay.