Trecco Bay Wind Statistics, Spring averages since 2006
The rose diagram illustrates how often and how strongly the wind blows from different directions over a normal northern hemisphere spring. The biggest spokes point in the directions the wind most commonly blows from and the shade of blue indicates the strength, with the darkest shade of blue showing the strongest winds. It is based on 5139 NWW3 forecasts of wind since since 2007, at 3hr intervals, for the closest NWW3 model node to Trecco Bay, located 22 km away (14 miles). There are insufficient recording stations world wide to use actual wind data. Without question some coastal places have very localized wind effects that would not be predicted by NWW3.
According to the model, the prevailing wind at Trecco Bay blows from the WSW. If the rose plot shows a nearly round shape, it means there is no strong bias in wind direction at Trecco Bay. By contrast, dominant spokes represent favoured directions, and the more deep blue, the stronger the wind. Spokes point in the direction the wind blows from. During a typical northern hemisphere spring, the model suggests that winds are light enough for the sea to be glassy (the lightest shade of blue) about 11% of the time (10 days each northern hemisphere spring) and blows offshore 28% of the time (2 days in an average northern hemisphere spring). Over an average northern hemisphere spring winds stronger than >40kph (25mph) are expected on 4 days at Trecco Bay
IMPORTANT: Beta version feature! Swell heights are open water values from NWW3. There is no attempt to model near-shore effects. Coastal wave heights will generally be less, especially if the break does not have unobstructed exposure to the open ocean.