Conditions at Uluwatu in September
September: Top-Tier Trade Wind Groundswell
September is arguably the pick of the season. Average size remains solid at 6-7ft (2.0m) and period holds at 14.3s. The direction concentrate shifts strongly to SSW (70.9%), with S (11.3%) and SW (3.4%) in support; most energy sits between 5-8ft (1.5-2.5m). The wind dynamic is excellent: ESE (39.1%), SE (32.5%) and SSE (12.9%) deliver a moderate, groomed trade-wind flow, and ideal wind reaches 77%-the highest of the dry season. Expect powerful, well-shaped reef waves and a far lower chance of blown-out conditions. Water temp is 26.8°C, air 25.8°C, rain just 0.98 mm/day.
Average Spot conditions at Uluwatu in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Uluwatu 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 Uluwatu for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Uluwatu 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 Uluwatu.