This image shows only the swells directed at Ras Al Jazirah that coincided with light winds or offshore conditions through a typical northern hemisphere summer. It is based on 5066 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 illustrates the highest swells, greater than >3m (>10ft). In either graph, the area of any colour is proportional to how commonly that size swell was forecast.
The diagram implies that the most common 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 80% of the time, equivalent to 73 days. Expect open water swells to exceed >3m (>10ft) 5% of the time (5 days). Taking into account the ratio of these swells that coincided with expected offshore winds, and given the fact that Ras Al Jazirah is exposed to open water swells, we think that that clean surf can be found at Ras Al Jazirah about 80% of the time and that surf is spoilt by onshore wind 2.0% of the time. This is means that we expect 75 days with waves in a typical northern hemisphere summer, of which 73 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.