Statistiques de Houle pour Ala Moana Bowls, Toute l'Année: Vagues avec Vents Légers ou Favorables.
This image shows only the swells directed at Ala Moana Bowls that coincided with light winds or offshore conditions over a normal year. It is based on 28044 predictions, one every 3 hours. The direction of the spokes show where quality surf generating swell comes from. Five colours show increasing wave sizes. The smallest swells, less than 0.5m (1.5 feet), high are coloured blue. Green and yellow show increasing swell sizes and biggest 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 occurs.
The diagram suggests that the most common swell direction, shown by the longest spokes, was S, whereas the the prevailing wind blows from the ENE. 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 14% of the time, equivalent to 51 days. Open sea swells exceeding >3m (>10ft) are unlikely to happen in a normal year but 4% of the time you can expect swell in the range 1.3-2m (4-6.5ft) 4%, equivalent to (15 days). Taking into account the ratio of these swells that coincided with expected offshore winds, and given the fact that Ala Moana Bowls is exposed to open water swells, we calculate that clean surf can be found at Ala Moana Bowls about 14% of the time and that surf is blown out by onshore wind 23% of the time. This is means that we expect 135 days with waves in a typical year, of which 51 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.