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Conditions at Seal Point in September
September: Spring Swing and Shoulder Season Gems
September is a transition month, but it still packs a punch. The average swell is 10ft (3.0m) with an 11.8s period. SW (13.0%), SSW (8.6%) and S (4.6%) continue to supply Southern Ocean groundswell, while the E-ESE-SE-SSE window expands to around 9 percent as spring sunshine starts to generate more easterly windswell and hybrid groundswell. This combination can produce some of the most varied and interesting surf of the year.
Winds become less reliable as spring sets in. The offshore W/WNW/NW/NNW quadrant drops to around 30 percent and ideal surf wind is 26 percent, while onshore E/ESE wind begins to build (E 9.1%, ENE 12.8%). Water temperature is 17.0°C and air temps average 16.1°C. When the morning light wind coincides with a declining SW swell or a fresh SE pulse, September can be truly excellent.
Average Spot conditions at Seal Point in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Seal Point 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 Seal Point for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Seal Point 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 Seal Point.