Conditions at Martinhal in September
September: Autumn's Clean Re-Entry
September is a hidden gem at Martinhal. The average wave height rises slightly to around 5ft (1.5m) and the period climbs to 10.4s, translating into more genuine groundswell energy. Swell direction is still NW-heavy, with NW at 47.1%, NNW at 25.5% and WNW at 14.3%, but the wind resource is the best of the year: ideal conditions 36% of the time. NNW winds are less extreme than in summer at 46.0%, with plenty of light-to-moderate 10-20kph spells, and NW adds another 12.2%. Air is warm at 21.0°C, water is at its warmest at 19.3°C, and rain stays modest at 0.75mm/day. The combination of clean offshores, warm water and early autumn swells makes September one of the most pleasant months for surfing this southeast-facing coastline.
Average Spot conditions at Martinhal in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Martinhal 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 Martinhal for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Martinhal 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 Martinhal.