Conditions at Altura in September
September: The North Atlantic Begins to Wake
September is the first month of the long climb back into surf season. Average height is still modest at around 1-2ft (0.5m), but the period improves to 5.8s, a sign that the ocean is assembling more organized swell. The southern quadrant looks active: SE jumps to 16.0 percent, SSE 7.0 percent, S 3.9 percent and SSW 3.9 percent, which gives Altura one of the largest usable direction windows of the year. WSW and W still lead the overall rose but are less relevant. Wind quality remains summer-like, with NNW at 25.8 percent and NW at 10.0 percent, yet ideal conditions sit at 19 percent due to frequent SSW and SW flow. Water is a warm 21.0C, air averages 22.3C, and rain increases to 0.69 mm/day. September is inconsistent, but late-month groundswell pulses are the first real taste of autumn.
Average Spot conditions at Altura in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Altura 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 Altura for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Altura 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 Altura.