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Conditions at Bells Beach in September
September: Late-Winter XL Potential
September is the month with the highest average swell height of the year at 1.4m (4.6ft), while the average period remains at an impressive 13.0 seconds. The wave rose shows SW swell at its annual peak of 51.7%, with SSW adding 22.1% and WSW another 10.5%. There is a significant amount of 1.5-2m swell and a healthy share of 2-2.5m waves, giving Bells some of its biggest, most powerful days of the year.
Ideal offshore wind remains quite good at 47%, although spring is starting to introduce more variability. W wind is prominent at 13.0%, WNW at 15.9%, NNW at 12.7% and NW at 10.6%, so there are still plenty of world-class windows. Water temperature is a chilly 13.4°C, air temperatures average 12.1°C, and rainfall is high at 2.60 mm/day. This is a charging month for confident surfers, with XXL potential when the low-pressure track aligns perfectly.
Average Spot conditions at Bells Beach in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Bells 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 Bells Beach for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Bells 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 Bells Beach.