Airport Lefts Golf Statistieken, Winter: Golven met Licht of Offshore Winden
This image shows only the swells directed at Airport Lefts that coincided with light winds or offshore conditions through a typical southern hemisphere winter. It is based on 7266 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 show 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 often that size swell was forecast.
The diagram indicates that the dominant swell direction, shown by the longest spokes, was SW, whereas the the dominant wind blows from the ESE. 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 98% of the time, equivalent to 89 days. Open water swells exceeding >3m (>10ft) only occur 1.5% of the time in a typical southern hemisphere winter, equivalent to just one day but 66% of the time we expect swell in the range 2-3m (6.5-10ft) 66%, equivalent to (60 days). Taking into account the proportion of these swells that coincided with forecast offshore winds, and given the fact that Airport Lefts is exposed to open water swells, we estimate that clean surf can be found at Airport Lefts about 98% of the time and that surf is blown out by onshore wind 1.0% of the time. This is means that we expect 90 days with waves in a typical southern hemisphere winter, of which 89 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.