Helena Bay Wind Stats

The rose diagram illustrates how frequently and how strongly the wind blows from different directions over a normal May. The largest spokes point in the directions the wind most commonly blows from and the shade of blue suggests the strength, with dark blue showing the strongest winds. It is based on 3440 NWW3 forecasts of wind since since 2007, at 3hr intervals, for the closest NWW3 model node to Helena Bay, located 14 km away (9 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 dominant wind at Helena Bay blows from the ENE. If the rose plot shows a nearly round shape, it means there is no strong bias in wind direction at Helena Bay. On the other hand, dominant spokes show favoured directions, and the more deep blue, the stronger the wind. Spokes point in the direction the wind blows from. During a typical May, the model suggests that winds are light enough for the sea to be glassy (the lightest shade of blue) about 11% of the time (3 days each May) and blows offshore 43% of the time (3 days in an average May). Over an average May wind stronger than >40kph (25mph) was predicted for only a single days at Helena Bay

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