Conditions at Oyambre in September
September: Autumn's First Clean Groundswell
September is when the surf year starts to wake up again. Average height rises to 1.3m (4-5ft) and period stretches to 10.3s, so the waves regain some push even before the storm track truly activates. The swell rose remains firmly in the north-west quadrant: 50.2% from the NW, 25.7% from the NNW and 7.6% from the WNW. The distribution shifts up a gear, with a much larger share of 1-2.5m (3-8ft) waves than in July or August.
Ideal offshore wind improves to 25%, but E and ENE winds (11.8% and 12.7%) still try to rule the afternoons. The early autumn sun can make the water feel warm at 19.9°C, air temperature is 19.3°C and precipitation starts to increase at 1.92 mm/day. September offers the best balance of warm-ish weather and real surf, especially in the second half of the month when the lows begin to wake up.
Average Spot conditions at Oyambre in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Oyambre 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 Oyambre for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Oyambre 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 Oyambre.