Anglet - La Barre Swell Statistics, All Year: Surf with Light or Offshore Winds
The rose diagram shows only the swells directed at Anglet - La Barre 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 illustrate 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 was forecast.
The diagram suggests that the dominant swell direction, shown by the biggest 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 13% of the time, equivalent to 47 days. Open water swells exceeding >3m (>10ft) only occur 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 proportion of these swells that coincided with expected offshore winds, and given the fact that Anglet - La Barre is slightly protected from open water swells, we estimate that clean surf can be found at Anglet - La Barre about 13% of the time and that surf is spoilt by onshore wind 38% of the time. This is means that we expect 186 days with waves in a typical year, of which 47 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.