Conditions at Vanimo in September
September: Springboard to the Swell Season
September starts to stir from the winter lull. Average surf height remains small at 0.7m (2.3ft), but the period climbs to 9.3s, a sign that longer-period energy is beginning to filter back into the system. NE is the leading swell direction at 34.2%, followed by NNE at 25.9% and ENE at 24.4%. There is also a slight uptick in N and NNW pulses, which Vanimo's exposed orientation loves.
The trade winds are still dominant, with E, ESE and SE directions combining for a large share of observations, and ideal wind remains low at 42%. Still, the ocean has more shape than in July and August. Water temperature is 29.0°C, rainfall eases to 5.19mm/day, and the first hints of the coming monsoon begin to appear.
Average Spot conditions at Vanimo in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Vanimo 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 Vanimo for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Vanimo 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 Vanimo.