This image shows only the swells directed at Haqal that coincided with light winds or offshore conditions over a normal June. It is based on 1600 predictions, one every 3 hours. The direction of the spokes show where quality surf generating swell comes from. Five colours illustrate increasing wave sizes. Blue shows the smallest swells, less that 0.5m (1.5 feet) high. Green and yellow illustrate increasing swell sizes and red shows highest 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 prevailing swell direction, shown by the largest spokes, was S, whereas the the dominant wind blows from the SSW. 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 82% of the time, equivalent to 25 days. Expect open water swells to exceed >3m (>10ft) 6% of the time (2 days). Taking into account the fraction of these swells that coincided with predicted offshore winds, and given the fact that Haqal is exposed to open water swells, we estimate that clean surf can be found at Haqal about 82% of the time and that surf is spoilt by onshore wind 18% of the time. This is means that we expect 30 days with waves in a typical June, of which 25 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.