Viana do Castelo Wind Stats

This chart describes how often and how strongly the wind blows from different directions over a normal April. The biggest spokes point in the directions the wind most commonly blows from and the shade of blue implies the strength, with dark blue showing the strongest winds. It is based on 3360 NWW3 forecasts of wind since since 2007, at 3hr intervals, for the closest NWW3 model node to Viana do Castelo, located 25 km away (16 miles). There are insufficient 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 Viana do Castelo 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 Viana do Castelo. Converseley, dominant spokes represent 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 April, the model suggests that winds are light enough for the sea to be glassy (light blue) about 18% of the time (5 days each April) and blows offshore 41% of the time (12 days in an average April). Over an average April wind stronger than >40kph (25mph) was expected for only a single days at Viana do Castelo

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