Ardnave Point and Bay (Islay) Swell Statistics, All Year: Surf with Light or Offshore Winds
This image shows only the swells directed at Ardnave Point and Bay (Islay) 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 represent increasing swell sizes and red illustrates 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 prevailing swell direction, shown by the longest spokes, was W, whereas the the dominant wind blows from the SW. 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 16% of the time, equivalent to 58 days. Expect open water swells to exceed >3m (>10ft) 4% of the time (15 days). Taking into account the ratio of these swells that coincided with predicted offshore winds, and given the fact that Ardnave Point and Bay (Islay) is quite sheltered from open water swells, we think that that clean surf can be found at Ardnave Point and Bay (Islay) about 16% of the time and that surf is blown out by onshore wind 22% of the time. This is means that we expect 139 days with waves in a typical year, of which 58 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.