Conditions at Ondarreta in November
November: Full-On Autumn Groundswell
November is the most consistent month of the autumn surge. The average swell height reaches 1.9m (6ft) and the average period is 11.8s, meaning powerful, organized groundswell is the rule rather than the exception. Swell direction is spread across the NW (32.2%) and WNW (26.5%) windows, with NNW at 9.1% and W at 3.3%. The table of wave heights confirms a healthy spread: a strong share of waves arrive in the 1.5-2m (5-6.5ft) and 2-2.5m (6.5-8ft) range, with some sets bumping well overhead.
The wind story remains excellent. Ideal offshore winds are present 47% of the time; the S sector is the heavyweight at 18.4%, with SSW at 8.1% and SW at 4.2%. This is the formula for classic Basque surf: WNW/NW groundswell wrapping into the bay, groomed by continental south wind. November is also the wettest month of the year, with average precipitation of 4.76 mm/day, so expect active fronts and plenty of rain. Air temps fall to 12.2°C, water to 16.1°C, and it is time to break out the winter wetsuit again.
Average Spot conditions at Ondarreta in November
Swell history for November
Wind history for November
Swell quality
Analyze the groundswell consistency at Ondarreta during November. 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 November.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Ondarreta for November. 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.