Conditions at Machico in September
September: First Signs of Autumn
September is a quiet-changing month. Swell height edges up to 1.6m (5.2ft) and period increases to 10.5s, as early autumn lows begin to stir in the North Atlantic. The wave rose is still dominated by NNW (40.4%) and NW (16.7%), with NNE and N also present; optimal E/SE swell is still only a trace. Ideal wind conditions are strong at 58%, and the NNE trade wind is less extreme than midsummer (30.6%), so the surface can remain clean between pulses. Water temperature is still warm at 23.6°C-the warmest of the year-air averages 22.5°C, and rainfall starts to pick up to 0.58 mm/day. The last true summer swells and the first autumn groundswells can overlap, making September one of the more interesting months for a small-to-medium wave session.
Average Spot conditions at Machico in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Machico 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 Machico for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Machico 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 Machico.