Caswell Bay Wind Stats

The rose diagram describes how commonly and how strongly the wind blows from different directions over a normal April. 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 strongest. It is based on 3359 NWW3 forecasts of wind since since 2007, at 3hr intervals, for the closest NWW3 model node to Caswell Bay, located 8 km away (5 miles). There are not enough 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 Caswell Bay 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 Caswell Bay. Converseley, dominant spokes illustrate favoured directions, and the more dark 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 (pale blue) about 14% of the time (4 days each April) and blows offshore 32% of the time (0 days in an average April). Over an average April wind stronger than >40kph (25mph) was expected for only a single days at Caswell Bay

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