Guethary - Les Alcyons/Avalanche Wind Stats

The graph describes how often and how strongly the wind blows from different directions over a normal September. The largest spokes point in the directions the wind most commonly blows from and the shade of blue implies the strength, with the darkest shade of blue showing the strongest winds. It is based on 3359 NWW3 forecasts of wind since since 2006, at 3hr intervals, for the closest NWW3 model node to Guethary - Les Alcyons/Avalanche, located 32 km away (20 miles). There are insufficient recording stations world wide to use actual wind data. Invevitably some coastal places have very localized wind effects that would not be predicted by NWW3. According to the model, the prevailing wind at Guethary - Les Alcyons/Avalanche blows from the WNW. If the rose diagram shows a close to circular outline, it means there is no strong bias in wind direction at Guethary - Les Alcyons/Avalanche. On the other hand, dominant spokes show favoured directions, and the more the darkest shade of blue, the stronger the wind. Spokes point in the direction the wind blows from. During a typical September, the model suggests that winds are light enough for the sea to be glassy (the lightest shade of blue) about 26% of the time (8 days each September) and blows offshore 41% of the time (12 days in an average September). Over an average September wind stronger than >40kph (25mph) was expected for only a single days at Guethary - Les Alcyons/Avalanche

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