Asu Wind Statistics, Autumn averages since 2006
The figure shows how often and how strongly the wind blows from different directions through a typical northern hemisphere autumn. The largest spokes point in the directions the wind most commonly blows from and the shade of blue suggests the strength, with deep blue strongest. It is based on 7252 NWW3 forecasts of wind since since 2006, at 3hr intervals, for the closest NWW3 model node to Asu, located 30 km away (19 miles). There are insufficient recording stations world wide to use actual wind data. Invevitably some coastal places have very localized wind effects that would not be predicted by NWW3.
According to the model, the most common wind at Asu blows from the SSW. If the rose plot shows a nearly round shape, it means there is no strong bias in wind direction at Asu. By contrast, dominant spokes show favoured directions, and the more the darkest shade of blue, the stronger the wind. Spokes point in the direction the wind blows from. Over an average northern hemisphere autumn, the model suggests that winds are light enough for the sea to be glassy (light blue) about 53% of the time (48 days each northern hemisphere autumn) and blows offshore 70% of the time (64 days in an average northern hemisphere autumn). During a typical northern hemisphere autumn winds exceeding >40kph (25mph) are not expected, but 0 have winds on the range 30-40 (19-25) at Asu
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.