Airport Lefts Swell Statistics, All Year: Surf with Light or Offshore Winds
The rose diagram shows only the swells directed at Airport Lefts 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 represent increasing wave sizes. Very small swells of less than 0.5m (1.5 feet) high are shown in blue. Green and yellow illustrate increasing swell sizes and red illustrates highest swells greater than >3m (>10ft). In each graph, the area of any colour is proportional to how often that size swell occurs.
The diagram indicates that the prevailing swell direction, shown by the biggest spokes, was SW, whereas the the dominant wind blows from the SSE. 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 76% of the time, equivalent to 277 days. Expect open water swells to exceed >3m (>10ft) 0.6% of the time (2 days). Taking into account the ratio of these swells that coincided with expected offshore winds, and given the fact that Airport Lefts is exposed to open water swells, we think that that clean surf can be found at Airport Lefts about 76% of the time and that surf is messed up by onshore wind 24% of the time. This is means that we expect 365 days with waves in a typical year, of which 277 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.