The figure describes how frequently and how strongly the wind blows from different directions over a normal June. The longest spokes point in the directions the wind most commonly blows from and the shade of blue suggests the strength, with dark blue strongest. It is based on 1589 NWW3 forecasts of wind since since 2006, at 3hr intervals, for the closest NWW3 model node to La Garde Guerin, located 41 km away (25 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 dominant wind at La Garde Guerin blows from the WNW. If the rose graph shows a fairly circular pattern, it means there is no strong bias in wind direction at La Garde Guerin. Converseley, dominant spokes illustrate favoured directions, and the more the darkest shade of blue, the stronger the wind. Spokes point in the direction the wind blows from. During a typical June, the model suggests that winds are light enough for the sea to be glassy (light blue) about 12% of the time (4 days each June) and blows offshore 18% of the time (2 days in an average June). Over an average June wind stronger than >40kph (25mph) was predicted for only a single days at La Garde Guerin
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.