The figure describes how commonly and how strongly the wind blows from different directions over a normal southern hemisphere autumn. The biggest 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 4842 NWW3 forecasts of wind since since 2007, at 3hr intervals, for the closest NWW3 model node to Aisling's Beach, located 7 km away (4 miles). There are not enough 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 most common wind at Aisling's Beach blows from the SE. If the rose diagram shows a close to circular outline, it means there is no strong bias in wind direction at Aisling's 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. During a typical southern hemisphere autumn, the model suggests that winds are light enough for the sea to be glassy (light blue) about 21% of the time (19 days each southern hemisphere autumn) and blows offshore 50% of the time (44 days in an average southern hemisphere autumn). Over an average southern hemisphere autumn winds exceeding >40kph (25mph) are not expected, but 1 have winds on the range 30-40 (19-25) at Aisling's 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.