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Conditions at Aramoana in September
September: Spring Gear Change
September is a springboard month. Long-period SSW swell still dominates, but the NE quadrant continues to strengthen, with ENE and NE combining around 15% of the wave spectrum. Average wave height settles to 6-7ft (2.0m), period remains powerful at 11.1s, and ideal wind days drop slightly to 23% as the spring storm track becomes more erratic. Air temps start to climb, averaging 8.8°C, while water temp is still cool at 10.2°C. Precipitation is moderate at 1.59 mm/day. The wind fields are a battle between NW/NNW flows and south-westerly changes; when the south-west wins, Aramoana's NE-facing banks can produce clean, punchy waves with winter strength still in the water.
Average Spot conditions at Aramoana in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Aramoana 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 Aramoana for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Aramoana 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 Aramoana.