Statistiques de Houle pour Anse Trabaud, Août: Vagues avec Vents Légers ou Favorables.
This image shows only the swells directed at Anse Trabaud that coincided with light winds or offshore conditions over a normal August. It is based on 2480 predictions, one every 3 hours. The direction of the spokes show where quality surf generating swell comes from. Five colours illustrate increasing wave sizes. Blue shows the smallest swells, less that 0.5m (1.5 feet) high. Green and yellow show increasing swell sizes and biggest swells greater than >3m (>10ft) are shown in red. In either graph, the area of any colour is proportional to how often that size swell occurs.
The diagram indicates that the dominant swell direction, shown by the biggest spokes, was E (which was the same as the prevailing wind direction). The chart at the bottom shows the same thing but without direction information. For example, swells larger than 1.5 feet (0.5m) coincided with good wind conditions 0.8% of the time, equivalent to 0 days. Open sea swells exceeding >3m (>10ft) are unlikely to happen in a normal August. Taking into account the fraction of these swells that coincided with forecast offshore winds, and given the fact that Anse Trabaud is slightly protected from open water swells, we think that that clean surf can be found at Anse Trabaud about 0.8% of the time and that surf is messed up by onshore wind 37% of the time. This is means that we expect 12 days with waves in a typical August, of which 0 days should be surfable.
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.