Statistiques de Vent de Arrieta, moyennes sur Octobre depuis 2006
This image illustrates how frequently and how strongly the wind blows from different directions through a typical October. The biggest spokes point in the directions the wind most commonly blows from and the shade of blue implies the strength, with deep blue showing the strongest winds. It is based on 2480 NWW3 forecasts of wind since since 2006, at 3hr intervals, for the closest NWW3 model node to Arrieta, located 41 km away (25 miles). There are too few recording stations world wide to use actual wind data. No doubt some coastal places have very localized wind effects that would not be predicted by NWW3.
According to the model, the most common wind at Arrieta blows from the NNW. If the rose plot shows a nearly round shape, it means there is no strong bias in wind direction at Arrieta. Converseley, 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. Over an average October, the model suggests that winds are light enough for the sea to be glassy (light blue) about 12% of the time (4 days each October) and blows offshore 29% of the time (2 days in an average October). During a typical October wind stronger than >40kph (25mph) was expected for only a single days at Arrieta
IMPORTANT: Beta version feature! Swell heights are open water values from NWW3. There is no attempt to model near-shore effects. Coastal wave heights will generally be less, especially if the break does not have unobstructed exposure to the open ocean.