Anglet - La Madrague Swell Statistics, All Year: Surf with Light or Offshore Winds
The rose diagram shows only the swells directed at Anglet - La Madrague that coincided with light winds or offshore conditions through a typical year and is based upon 28042 predictions, one every 3 hours. The direction of the spokes show where quality surf generating swell comes from. Five colours represent increasing wave sizes. Very small swells of less than 0.5m (1.5 feet) high are shown in blue. Green and yellow show increasing swell sizes and largest swells greater than >3m (>10ft) are shown in red. In both graphs, the area of any colour is proportional to how often that size swell occurs.
The diagram indicates that the prevailing swell direction, shown by the largest spokes, was WNW (which was the same as the most common 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 happen 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 fraction of these swells that coincided with expected offshore winds, and given the fact that Anglet - La Madrague is exposed to open water swells, we estimate that clean surf can be found at Anglet - La Madrague 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.