Conditions at Serapo in September
September: First Whiff of Autumn
September is the first month where the surf pulse begins to quicken. Average height nudges up to around 1.5ft (0.5m), period 4.5s, and ideal wind improves to 18 percent. The dominant swell is still W at 31 percent, with WNW at 14 percent and WSW at 11 percent, but SSW and SW also begin to contribute more meaningfully. Air temperatures remain warm, water temp is still a balmy 23.9°C (75°F), and the afternoon seabreeze is weakening. This is a transitional month: the flat summer regime is still in place, but the first autumn low in the Tyrrhenian can deliver a 3-5ft (1-1.5m) SSW/SW swell with clean north wind behind it. It will not be consistent yet, but the potential is there.
Average Spot conditions at Serapo in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Serapo 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 Serapo for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Serapo 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 Serapo.