The rose diagram illustrates how often and how strongly the wind blows from different directions through a typical May. The largest spokes point in the directions the wind most commonly blows from and the shade of blue indicates the strength, with the strongest winds shown by deep blue. It is based on 1488 NWW3 forecasts of wind since since 2007, at 3hr intervals, for the closest NWW3 model node to Maroochydore Beach, located 43 km away (27 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 prevailing wind at Maroochydore Beach blows from the ESE. If the rose plot shows a nearly round shape, it means there is no strong bias in wind direction at Maroochydore Beach. By contrast, dominant spokes illustrate favoured directions, and the more deep blue, the stronger the wind. Spokes point in the direction the wind blows from. Over an average May, the model suggests that winds are light enough for the sea to be glassy (light blue) about 9% of the time (3 days each May) and blows offshore 35% of the time (11 days in an average May). In a typical May winds stronger than >40kph (25mph) are expected on 2 days at Maroochydore Beach
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.