Conditions at Mundaka in September
September: The Renaissance Begins
September is when Mundaka starts to wake from its summer sleep. The average swell has grown to 4ft (1.2m) and the average period stretched back to 10.3s-the first hint of real groundswell since spring. The direction registry is still dominated by NW at 52.1%, with NNW 18.0% and WNW 15.3%, and the wave height distribution shows more spread into the 3-6.5ft (1-2m) range. A good NW pulse in late September can turn the rivermouth back on.
Wind patterns shift back toward slightly more favorable angles. While ENE winds are still frequent at 10.5%, WNW winds also decrease from midsummer, and the ideal wind percentage climbs to 24%. Early autumn high-pressure transitions bring clean, warm offshore mornings with the water still at a very pleasant 20.7°C. Air temperatures average 19.5°C, precipitation is manageable, and the points feel alive again. September is often the sneaky-good month for Mundaka-not as heavy as winter, but with the surface clean and the vibe mellow.
Average Spot conditions at Mundaka in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Mundaka 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 Mundaka for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Mundaka 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 Mundaka.