Conditions at Guethary in August
August: Warmest Water, First Hints of Autumn
August is very similar to July but with a touch more life. Average wave height stays at 3ft (0.9m), period at 9.4s, and NW remains the dominant swell direction at 66.8%, with WNW 25.7% and NNW 6.6%. The height distribution is still small - most waves in the 2-3ft (0.5-1m) category - though the 3-5ft (1-1.5m) class becomes a more regular feature, especially from the NW. Early tropical lows and late-summer Atlantic lows can occasionally throw a longer-period pulse at the coast.
Wind quality improves just enough to notice: ideal 19% of the time. The NNW flow (18.8%) and NW flow (16.5%) still dominate, but the SE/S sector is more present than in July, giving occasional clean mornings. Water temperature peaks for the year at 22.9°C and air temp averages 20.8°C, making it the most comfortable month to be in the water. The surf won't be pumping, but the warm-water grovels can still be a lot of fun.
Average Spot conditions at Guethary in August
Swell history for August
Wind history for August
Swell quality
Analyze the groundswell consistency at Guethary 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 Guethary for your next trip in August.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Guethary 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 Guethary.