Porthleven Wind Stats

The figure describes how frequently and how strongly the wind blows from different directions through a typical October. The longest spokes point in the directions the wind most commonly blows from and the shade of blue suggests the strength, with the strongest winds shown by dark blue. It is based on 3471 NWW3 forecasts of wind since since 2006, at 3hr intervals, for the closest NWW3 model node to Porthleven, located 15 km away (9 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 Porthleven blows from the WSW. If the rose diagram shows a close to circular outline, it means there is no strong bias in wind direction at Porthleven. On the other hand, dominant spokes represent favoured directions, and the more deep 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 (the lightest shade of blue) about 5% of the time (2 days each October) and blows offshore 18% of the time (6 days in an average October). During a typical October winds stronger than >40kph (25mph) are expected on 3 days at Porthleven

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