All Day Bay Swell Statistics, All Year: Surf with Light or Offshore Winds
This image shows only the swells directed at All Day Bay that coincided with light winds or offshore conditions through a typical 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 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 often that size swell happens.
The diagram indicates that the prevailing swell direction, shown by the longest spokes, was SSE, 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 34% of the time, equivalent to 124 days. Expect open water swells to exceed >3m (>10ft) 1.1% of the time (4 days). Taking into account the fraction of these swells that coincided with predicted offshore winds, and given the fact that All Day Bay is exposed to open water swells, we estimate that clean surf can be found at All Day Bay about 34% of the time and that surf is blown out by onshore wind 34% of the time. This is means that we expect 248 days with waves in a typical year, of which 124 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.