Conditions at Lido di Ostia in September
September: Autumn's First Whispers
September is a transitional whisper. The average swell remains small at 2ft (0.6m), but the wave period edges up to 4.7s and the swell directions show a rebalance - our friend the WSW backs from 15% down to 12.6%, W to 17.3%, while the south/southeast components begin to stir (S 11.6%, SSE 9.0%). This marks the return of real atmospheric fronts pushing into the Mediterranean. Winds are still dominated by onshore SW-W directions (30%), but offshore easterlies (NE to ESE) bounce back to 18%, and the ideal wind ratio nearly doubles from July's low to 14%. The sea is still warm (23.3°C), and the first rain of the autumn (2.4 mm/day) signals changing seasons. For the locally savvy surfer, September is that tentative month to start eyeing forecasts again - the first consistent WNW/WSW swell pulses can arrive before the end of the month.
Average Spot conditions at Lido di Ostia in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Lido di Ostia 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 Lido di Ostia for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Lido di Ostia 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 Lido di Ostia.