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Conditions at Whangapoua Beach in September
September: Spring in Limbo
September is a transitional month that Whangapoua surfers often write off. The average period drops to 6.9s, a noticeable loss of power, and the favorable N-NNE-NE-ENE window remains around 39%. ENE at 13% and NE at 12% still lead, but NNW at 11% and W/SW sources take up more of the spectrum. Average height is still 1.5ft (0.5m), yet the shorter period makes almost everything feel choppy and disorganized.
Spring wind becomes the dominant feature. WSW at 17.3% and W at 14.0% are strong, and the wider offshore quadrant totals 33%, but the strength of those winds often exceeds what the small waves can handle. Ideal windows are only 2% of the time. Water temperature is 14.4°C, air averages 13.8°C, and rainfall drops slightly to 2.77mm/day. It is a month for low expectations, though the first extended periods of southwest-angled high pressure can briefly clean up the NE-ENE windswell.
Average Spot conditions at Whangapoua Beach in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Whangapoua Beach 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 Whangapoua Beach for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Whangapoua Beach 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 Whangapoua Beach.