Conditions at Motunau Beach Island in September
September: Spring Signals and Shifting Winds
September is a transition month, but a good one. Average surf height eases to 1.2m (4ft), period is still a respectable 10.4s, and ideal wind frequency sits at 47 percent. E and ESE continue to dominate the swell rose, while S contributes 11.7 percent and SSW another 3.6 percent. The Southern Ocean storm track is still active enough to deliver powerful S swell, yet the Nor'west offshore flow remains common. As water temperatures hover near 10.0°C and air temps climb to 9.3°C, the dawn patrol becomes more inviting; the quality days often come from S/SSW groundswell groomed by early NW winds before the sea breeze takes hold.
Average Spot conditions at Motunau Beach Island in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Motunau Beach Island 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 Motunau Beach Island for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Motunau Beach Island 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 Motunau Beach Island.