Conditions at Ondarreta in April
April: Bigger Swells, Messier Winds
April marks the first real transition month. Average wave heights fall to 1.5m (5ft) and the average period drops to 10.8s-still rideable and punchy, but losing the heavy winter consistency. Swell direction remains locked in the W/NW quadrant, with NW at 39.3%, WNW at 29.2%, and NNW at 15.5%, so there is no shortage of swell lines arriving from the Atlantic.
What suffers is wind quality. The ideal-wind percentage drops to 37%, and the prevailing breeze increasingly comes from NNW (11.7%), NW (10.6%) and WNW (11.3%)-sideshore or unfavourable directions that put texture on the face. S and SSW winds are still present at 8.4% and 4.9%, but they are less consistent. Air temps average 12.2°C, water temps 13.9°C. This is a month for staying alert: the days when the wind goes light south and the swell pulses are still very decent, but you will have to work harder to find that clean combination.
Average Spot conditions at Ondarreta in April
Swell history for April
Wind history for April
Swell quality
Analyze the groundswell consistency at Ondarreta during April. 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 April.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Ondarreta for April. 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.