Conditions at Mahe in September
September: Monsoon Ease, Still Plenty of Fun
The monsoon begins to weaken in September, but the surf remains very rideable. Average swell height is 2ft (0.6m), the period drops a bit to 8.8s, and the direction mix spreads out: WSW (49.7%), W (35.9%) and SW (11.5%) all favour the beach. Around 65% of waves are in the 2-3ft (0.5-1m) range, with occasional 3-5ft (1-1.5m) sets. The wind flow stays monsoon-influenced but becomes more variable; WNW/NW/NNW dominate at about 51%, and ideal wind sits at 21%. Onshore WSW/W winds are less frequent than in June or July. Rain decreases to 7.96 mm/day, air temperature is 25.4°C and water temperature is 27.8°C. It is the tail end of the prime window, but consistent, fun waves are still very much on the menu.
Average Spot conditions at Mahe in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Mahe 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 Mahe for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Mahe 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 Mahe.