Conditions at Ondarreta in October
October: The Atlantic Roars Back to Life
October is one of the classic months at Ondarreta. Average swell height jumps to 1.6m (5ft) and period climbs to 11.2s, and the North Atlantic is producing real groundswell again. The swell windows are NW (41.5%) and WNW (27.4%), with NNW at 8.7%; the distribution is shifted toward bigger waves, with 14.5% in the 1-1.5m (3-5ft) range, 10.4% at 1.5-2m (5-6.5ft), and 6.3% at 2-2.5m (6.5-8ft).
What makes October truly special is the wind. The ideal-wind percentage rises to 47%, carried by S winds at 17.5%, SSW at 7.6% and SW at 4.3%, with SSE also active at 10.7%. The storm track is becoming active, but the air and sea are still holding onto summer warmth: air temps average 16.1°C and water temps are a comfortable 18.5°C. When a low-pressure system sends long-period WNW/NW swell and the cold front clears with south winds behind it, Ondarreta turns into one of the best-value lineups in the Basque Country.
Average Spot conditions at Ondarreta in October
Swell history for October
Wind history for October
Swell quality
Analyze the groundswell consistency at Ondarreta during October. 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 Ondarreta for your next trip in October.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Ondarreta for October. 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 Ondarreta.