Statistiques de Houle pour Anglet - Les Dunes, Automne: Vagues avec Vents Légers ou Favorables.
This image shows only the swells directed at Anglet - Les Dunes that coincided with light winds or offshore conditions over a normal northern hemisphere autumn and is based upon 7251 predictions, one every 3 hours. The direction of the spokes show where quality surf generating swell comes from. Five colours show increasing wave sizes. The smallest swells, less than 0.5m (1.5 feet), high are coloured blue. Green and yellow show increasing swell sizes and red shows highest swells greater than >3m (>10ft). In both graphs, the area of any colour is proportional to how frequently that size swell occurs.
The diagram suggests that the dominant swell direction, shown by the longest spokes, was WNW, whereas the the dominant wind blows from the SW. 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 36% of the time, equivalent to 33 days. Open sea swells exceeding >3m (>10ft) are unlikely to happen in a normal northern hemisphere autumn but 5% of the time we expect swell in the range 2-3m (6.5-10ft) 5%, equivalent to (5 days). Taking into account the proportion of these swells that coincided with expected offshore winds, and given the fact that Anglet - Les Dunes is exposed to open water swells, we calculate that clean surf can be found at Anglet - Les Dunes about 36% of the time and that surf is spoilt by onshore wind 53% of the time. This is means that we expect 81 days with waves in a typical northern hemisphere autumn, of which 33 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.