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Conditions at Shipwreck Bay in September
September: First Green Shoots of Spring
September is the final month of the low season, but small signals of change are visible. Average height is still a solid 7ft (2.2m), and period lengthens to 12.7s, showing the storm track remains active. SW swell dominates at 31.8 percent, with WSW at 15.8 percent-the highest WSW share since July-while ideal offshore wind creeps up only to 19 percent. Importantly, the wind distribution starts to include more SSW (9.5 percent), SW (10.0 percent) and S (8.0 percent) than mid-winter, and rainfall drops to 3.14mm/day. Water temp is still a cold 15.0°C, but occasional high-pressure systems bring light offshore mornings that groom the NW/NNW swells into clean, offshore walls. Early spring at Shipwreck Bay is about fewer crowds and waiting for the right trough to pass.
Average Spot conditions at Shipwreck Bay in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Shipwreck 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 Shipwreck Bay for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Shipwreck 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 Shipwreck Bay.