Conditions at Murtosa in September
September: First Signs of Life
September marks the beginning of the autumn turnaround at Murtosa. The average swell height climbs to 1.6m (5.2ft) and, more importantly, the average period lengthens to 10.4s as the first Atlantic lows push farther south. Direction is still heavily NW (38.6%), with WNW at 23.3% and NNW at 20.0%, but the quality improves because longer-period groundswell begins mixing with the summer windswell. Most waves are in the 1-2m (3.3-6.6ft) range, and the 2-2.5m (6.5-8.2ft) class starts to reappear. The main limiting factor remains wind: ideal conditions are just 25%, and NNW wind still dominates at 33.1%. Yet the pattern is shifting-E/ESE winds begin to show up more often and the first autumn fronts bring windows of clean, offshore surf. Air temperatures are still pleasant at 19.8°C, rainfall rises to 1.78 mm/day, and water temperature stays warm at 17.4°C.
Average Spot conditions at Murtosa in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Murtosa 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 Murtosa for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Murtosa 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 Murtosa.