Conditions at Ondarreta in July
July: Peak Summer Flatness
July is the doldrums. Average wave height stays at 1.0m (3ft), and the average period drops to the year's lowest at 8.8s. The swell distribution is dominated by the NW at 65.3%, with the vast majority of energy in the 0.5-1m (2-3ft) category-36% of the total-and only a small percentage reaching 1.5m (5ft). Long-period Atlantic groundswell is rare; what you see is mostly short-period summer swell.
The wind does not help. The ideal offshore wind percentage sinks to just 25%, the lowest of the year, while NNW (19.1%), NW (14.6%) and NNE (11.6%) become the dominant breeze directions. These are exactly the unfavourable directions that flatten out and puff up Ondarreta's waves. With air temps at a pleasant 20.0°C, water at a warm 21.6°C and only 1.67 mm/day of rain, July is great for a beach day but not for serious surf. Small days can be fun on a longboard, especially during the rare light S/SSW wind mornings.
Average Spot conditions at Ondarreta in July
Swell history for July
Wind history for July
Swell quality
Analyze the groundswell consistency at Ondarreta during July. 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 July.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Ondarreta for July. 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.