Conditions at Avalon in September
September: Spring Flip - Lighter Swell, Morning Windows
September is a transitional and often underrated month. The average wave period falls to 8.9s, ideal wind drops to 37%, and the swell directions become more evenly spread: ENE 11%, E 11%, ESE 11%, SE 14%, SSE 21% and S 14%. The S component remains significant, but the E/ENE trade swell is already rebuilding, giving Avalon a variety of wave sizes, mostly 3-5ft (1-1.5m) with occasional clean overhead sets. The wind clock becomes a springtime mix, with NW, W, NNE and SSE all present. Morning offshore W/NW/NNW flows remain reliable enough that an early paddle is often sublime, and crowds are still smaller than in summer. Water temp is 18.2°C, air temp averages 15.6°C, and rainfall is low at 1.65 mm/day. As the days lengthen, this is the last quiet month before the summer sea-breeze machine fully returns.
Average Spot conditions at Avalon in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Avalon 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 Avalon for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Avalon 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 Avalon.