Porth Dinllaen Wind Stats

This chart describes how often and how strongly the wind blows from different directions over a normal September. The longest spokes point in the directions the wind most commonly blows from and the shade of blue suggests the strength, with deep blue showing the strongest winds. It is based on 3358 NWW3 forecasts of wind since since 2006, at 3hr intervals, for the closest NWW3 model node to Porth Dinllaen, located 8 km away (5 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 prevailing wind at Porth Dinllaen blows from the SW. If the rose graph shows a fairly circular pattern, it means there is no strong bias in wind direction at Porth Dinllaen. On the other hand, dominant spokes represent favoured directions, and the more dark 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 (light blue) about 9% of the time (3 days each September) and blows offshore 29% of the time (0 days in an average September). Over an average September winds stronger than >40kph (25mph) are expected on 2 days at Porth Dinllaen

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