Statistiques de Houle pour Noosa - Alexandria Bay, Avril: Vagues avec Vents Légers ou Favorables.
The rose diagram shows only the swells directed at Noosa - Alexandria Bay that coincided with light winds or offshore conditions through a typical April and is based upon 2160 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 the largest swells, greater than >3m (>10ft). In both graphs, the area of any colour is proportional to how commonly that size swell happens.
The diagram implies that the dominant swell direction, shown by the largest spokes, was SE (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 3% of the time, equivalent to 1 days. Open sea swells exceeding >3m (>10ft) are unlikely to arise in a normal April. Taking into account the proportion of these swells that coincided with forecast offshore winds, and given the fact that Noosa - Alexandria Bay is exposed to open water swells, we estimate that clean surf can be found at Noosa - Alexandria Bay about 3% of the time and that surf is spoilt by onshore wind 27% of the time. This is means that we expect 9 days with waves in a typical April, of which 1 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.