Conditions at Ribeira das Janelas in August
August: The Mid-Summer Lull
August looks very similar to July, with average swells around 4-5ft (1.3-1.4m) and periods hovering at 9.1s. The N and NNE sectors are dominant in the swell data, and the NNW still adds plenty. However, this energy is mostly a product of the persistent northerly wind regime, which also blows directly onshore. Ideal wind conditions show up just 6% of the time, and NE winds climb to 29.5% alongside NNE at 38.1%. The mid-summer lull is real: the surf is small, the period is short, and the surface is usually lumpy. Water temperature reaches its annual peak at 23.2°C, with air temps at 22.5°C and almost no rain at 0.21 mm/day. It is a classic Portuguese summer beach day, but not a destination surf session unless the forecast shows a southwest wind and a pulse of north swell.
Average Spot conditions at Ribeira das Janelas in August
Swell history for August
Wind history for August
Swell quality
Analyze the groundswell consistency at Ribeira das Janelas 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 Ribeira das Janelas for your next trip in August.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Ribeira das Janelas 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 Ribeira das Janelas.