Airport Lefts Golf Statistieken, October: 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 October. It is based on 2480 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 represent increasing swell sizes and red represents largest swells greater than >3m (>10ft). In each graph, the area of any colour is proportional to how frequently that size swell occurs.
The diagram suggests that the prevailing swell direction, shown by the largest spokes, was SSW, whereas the the most common wind blows from the SE. 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 88% of the time, equivalent to 27 days. Open sea swells exceeding >3m (>10ft) are unlikely to happen in a normal October but 36% of the time we expect swell in the range 2-3m (6.5-10ft) 36%, equivalent to (11 days). Taking into account the fraction of these swells that coincided with predicted 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 88% of the time and that surf is blown out by onshore wind 12% of the time. This is means that we expect 31 days with waves in a typical October, of which 27 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.