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Conditions at Duranbah in September
September: Spring Flips the Script
September marks the beginning of a gradual downgrade in surf quality as spring patterns return. Average wave height is still 3ft (0.9m), but the period shortens to 7.8s and ideal wind drops to 47%. The swell distribution becomes more easterly and northeasterly - NE, ENE and E make up about 45% of the total - but much of it is shorter-period trade swell. NNW winds also make a strong comeback at 21%, bringing morning texture and limiting the clean offshore windows. There are still great days when a late-season front provides W/SW winds; the water is a cool 20.5°C and rain is minimal.
Average Spot conditions at Duranbah in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Duranbah 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 Duranbah for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Duranbah 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 Duranbah.