Ala Moana Bowls Golf Statistieken, Winter: Golven met Licht of Offshore Winden
The rose diagram shows only the swells directed at Ala Moana Bowls that coincided with light winds or offshore conditions through a typical northern hemisphere winter. It is based on 6931 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 shows the largest swells, greater than >3m (>10ft). In both graphs, the area of any colour is proportional to how commonly that size swell was forecast.
The diagram implies that the dominant swell direction, shown by the largest spokes, was S, whereas the the most common wind blows from the ENE. 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 2% of the time, equivalent to 2 days. Open sea swells exceeding >3m (>10ft) are unlikely to occur in a normal northern hemisphere winter. Taking into account the proportion of these swells that coincided with expected offshore winds, and given the fact that Ala Moana Bowls is exposed to open water swells, we calculate that clean surf can be found at Ala Moana Bowls about 2% of the time and that surf is spoilt by onshore wind 4% of the time. This is means that we expect 5 days with waves in a typical northern hemisphere winter, of which 2 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.