Statistiques de Houle pour Agate Beach, Juillet: Vagues avec Vents Légers ou Favorables.
This image shows only the swells directed at Agate Beach that coincided with light winds or offshore conditions through a typical July 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 show increasing wave sizes. The smallest swells, less than 0.5m (1.5 feet), high are coloured blue. Green and yellow illustrate increasing swell sizes and red represents the highest swells, greater than >3m (>10ft). In both graphs, the area of any colour is proportional to how commonly that size swell occurs.
The diagram implies that the most common swell direction, shown by the largest spokes, was W, whereas the the dominant 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 8% of the time, equivalent to 2 days. Open sea swells exceeding >3m (>10ft) are unlikely to happen in a normal July. Taking into account the fraction of these swells that coincided with predicted offshore winds, and given the fact that Agate Beach is exposed to open water swells, we calculate that clean surf can be found at Agate Beach about 8% of the time and that surf is messed up by onshore wind 75% of the time. This is means that we expect 26 days with waves in a typical July, of which 2 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.