Conditions at Il Porto in September
September: A Faint Pulse of Autumn - First Hope After Summer
September is the first month that hints at the return of surf. Average swell height creeps back to 0.6m (2ft), and average period edges up to 4.3s. The direction tables remain summer-like, with WSW (15.0%), S (14.4%), SW (11.9%), SSE (10.6%) and SSW (8.9%) feeding the beach. More importantly, the proportion of 1-1.5m (3-5ft) waves starts to increase, especially from WSW (3.1%) and SW (1.3%). It is still small, but the trend is upward.
Autumn also brings a change in the wind regime. The offshore quadrant returns to about 22%, and the strong summer seabreezes start to weaken. SSE and SE winds remain common, but mornings are more likely to offer clean, light offshore flow before the sea breeze builds. Ideal surf wind sits at 8%. Water temperature is still warm at 23.1°C, air temperature averages 21.9°C, and precipitation picks up to 2.67 mm/day. Late September often provides the season's first proper SSW swell, even if it is still far from the winter juice.
Average Spot conditions at Il Porto in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Il Porto 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 Porto for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Il Porto 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 Porto.