Anglet - Corsaires Swell Statistics, All Year: Surf with Light or Offshore Winds
This image shows only the swells directed at Anglet - Corsaires that coincided with light winds or offshore conditions over a normal year. It is based on 28042 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 represent increasing swell sizes and highest swells greater than >3m (>10ft) are shown in red. In both graphs, the area of any colour is proportional to how frequently that size swell happens.
The diagram suggests that the prevailing swell direction, shown by the longest spokes, was WNW (which was the same as the dominant 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 32% of the time, equivalent to 117 days. Open water swells exceeding >3m (>10ft) only arise 0.3% of the time in a typical year, equivalent to just one day but 4% of the time we expect swell in the range 2-3m (6.5-10ft) 4%, equivalent to (15 days). Taking into account the ratio of these swells that coincided with expected offshore winds, and given the fact that Anglet - Corsaires is exposed to open water swells, we calculate that clean surf can be found at Anglet - Corsaires about 32% of the time and that surf is messed up by onshore wind 59% of the time. This is means that we expect 332 days with waves in a typical year, of which 117 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.