Conditions at Ondarreta in June
June: Summer Doldrums and Thermal Onshores
June is the official start of low season at Ondarreta. The average wave height bottoms out near 1.0m (3ft) and the average period sits at 9.2s-rideable but often weak. Directionally, the Atlantic still sends swell, with an enormous 56.0% from the NW and 23.8% from the WNW, but most of that energy is below 1.5m (5ft). It is classic summer swell mixed with background groundswell.
Winds turn against the sandbar. The ideal-wind percentage falls to just 30%. NNW winds are the most common at 16.9%, with NW at 13.2% and WNW at 12.7%; NNE/NE flows add another 15.3%. Those directions line up poorly with the beach's NNE exposure, chopping up whatever swell is present. Air temperatures warm to 17.9°C, water to 19.2°C, and rainfall is lower at 2.27 mm/day. If you are chasing clean waves, look for early south winds; otherwise, June is for longboarding and making the most of small windows.
Average Spot conditions at Ondarreta in June
Swell history for June
Wind history for June
Swell quality
Analyze the groundswell consistency at Ondarreta during June. 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 June.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Ondarreta for June. 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.