Conditions at Muli in September
September: Monsoon Tail, Swell Still Thick
September signals the early transition away from the southwest monsoon. The average swell height eases a touch to 1.6m (5.2ft) with an average period 11.0s. Swell distribution remains S/SSE heavy - SSE (46.3%), S (36.8%), SSW (10.3%) - but the wind begins to swing somewhat more toward the western quadrants: WSW (14.7%), W (12.1%) and SW (12.8%) are paired with SE (8.4%), SSE (9.3%), and S (9.6%). Ideal wind improves slightly to 33%, so it's still marginal. The bigger swells are still there, but the onshore/offshore ratio is poor. Air temperatures drop a bit to 27.4°C (24.8-29.3°C), precipitation is 5.95 mm/day, and water temp is 29.1°C. You'll need patience and luck to weave through the rain squalls and find a clean window, but the longer period S/SSE energy can offer a preview of the upcoming dry season glory.
Average Spot conditions at Muli in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Muli 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 Muli for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Muli 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 Muli.