Conditions at Rossnowlagh in August
August: The Bottom of the Curve
August remains firmly in the low season, but there is a faint pulse of change by the end of the month. Average swell height is 0.9m (around 3ft) and the average period is 8.8s, still short-period. The WNW window is at its annual max of 35.7%, with W at 20.7%, NW at 18.1%, and NNW at 10.7%, but the wave-size distribution is heavily loaded toward 0.5-1m surf. Ideal winds are only at 15%, and the dominant WSW, SW, and W winds are mostly onshore. The one bright spot is water temperature, which peaks at 16.3°C, making August the most comfortable month for a long session in a thin wetsuit. As the Atlantic begins to stir in the final week or two, the first proper groundswell of the autumn can occasionally show up.
Average Spot conditions at Rossnowlagh in August
Swell history for August
Wind history for August
Swell quality
Analyze the groundswell consistency at Rossnowlagh during August. 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 Rossnowlagh for your next trip in August.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Rossnowlagh for August. 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 Rossnowlagh.