Conditions at Santa Marinella in September
September: Early Autumn Stirrings and the First Real Southerly Swells
September marks the beginning of the slow crawl back toward surfable energy. The average swell height remains small, around 2ft (0.6m), but the average period ticks up slightly to 4.3s. The distribution of direction becomes more interesting: WSW still leads at 15.0%, but S jumps to 14.4%, SSE hits 10.6% and SSW adds 8.9%. Crucially, the favourable directions begin to show slightly more size. SSE has 1.9% in the 1-1.5m (3-5ft) class and 0.6% in the 1.5-2m (5-6ft) class, while S has 1.7% in the 1-1.5m range. This is the first real suggestion of autumn low-pressure systems feeding the Tyrrhenian. The wind, however, is still partly summer-like, with SSE at 9.6%, SE at 8.3%, NNE at 7.3% and WNW at 7.3% sharing the rose. Ideal offshore conditions only reach 8%. Water remains very warm at 23.1C, air temperatures average 21.9C, and precipitation rises to 2.67 mm/day as the early season fronts start to arrive.
Average Spot conditions at Santa Marinella in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Santa Marinella 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 Santa Marinella for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Santa Marinella 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 Santa Marinella.