Conditions at Il Bunker in September
September: Autumn's First Pulse - Small but Gradually Improving
September marks the beginning of the seasonal switch. Average swell edges back up to 2ft (0.6m), period stretches to 4.3s, and ideal wind improves to 12%. The southern-swell window remains active: S, SW, SSW, SSE, plus a strong WSW component. Most waves are still small, but the first cold fronts can generate 1-1.5m pulses that break under morning offshore winds. The pressure gradient strengthens as summer high pressure weakens; rainfall jumps to 2.67mm/day, while sea surface temperature remains warm at 23.2°C and air temperature averages 21.9°C. Late September often delivers the first rideable sessions since spring, especially when incoming fronts bring NNE/NE offshore winds in their wake.
Average Spot conditions at Il Bunker in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Il Bunker 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 Il Bunker for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Il Bunker 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 Il Bunker.