Anse de Lesconil Swell Statistics, December: Surf with Light or Offshore Winds
This image shows only the swells directed at Anse de Lesconil that coincided with light winds or offshore conditions through a typical December. It is based on 2457 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 red shows the highest swells, greater than >3m (>10ft). In either graph, 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 longest spokes, was W, whereas the the dominant wind blows from the WSW. 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 10 days. Expect open water swells to exceed >3m (>10ft) 13% of the time (4 days). Taking into account the fraction of these swells that coincided with predicted offshore winds, and given the fact that Anse de Lesconil is slightly protected from open water swells, we estimate that clean surf can be found at Anse de Lesconil about 32% of the time and that surf is messed up by onshore wind 51% of the time. This is means that we expect 25 days with waves in a typical December, of which 10 days should be clean enough to surf.
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.