Statistiques de Houle pour Azarujinha, Octobre: Vagues avec Vents Légers ou Favorables.
This image shows only the swells directed at Azarujinha that coincided with light winds or offshore conditions over a normal October and is based upon 2480 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 each graph, the area of any colour is proportional to how commonly that size swell was forecast.
The diagram implies that the dominant swell direction, shown by the largest spokes, was W, whereas the the prevailing wind blows from the NW. 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 4% of the time, equivalent to 1 days. Open sea swells exceeding >3m (>10ft) are unlikely to occur in a normal October. Taking into account the fraction of these swells that coincided with predicted offshore winds, and given the fact that Azarujinha is exposed to open water swells, we estimate that clean surf can be found at Azarujinha about 4% of the time and that surf is messed up by onshore wind 12% of the time. This is means that we expect 5 days with waves in a typical October, of which 1 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.