Anse Cafard Swell Statistics, Spring: Surf with Light or Offshore Winds
The rose diagram shows only the swells directed at Anse Cafard that coincided with light winds or offshore conditions over a normal northern hemisphere spring. It is based on 6580 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 illustrate increasing swell sizes and red represents biggest 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 most common swell direction, shown by the longest spokes, was E (which was the same as the prevailing 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 0.2% of the time, equivalent to 0 days. Open sea swells exceeding >3m (>10ft) are unlikely to happen in a normal northern hemisphere spring. Taking into account the proportion of these swells that coincided with predicted offshore winds, and given the fact that Anse Cafard is slightly protected from open water swells, we calculate that clean surf can be found at Anse Cafard about 0.2% of the time and that surf is spoilt by onshore wind 43% of the time. This is means that we expect 39 days with waves in a typical northern hemisphere spring, of which 0 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.