Anaehoomalu Bay_A-Bay Swell Statistics, Setembro: Surf with Light or Offshore Winds
This image shows only the swells directed at Anaehoomalu Bay_A-Bay that coincided with light winds or offshore conditions through a typical September. It is based on 2400 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 biggest swells greater than >3m (>10ft) are shown in red. In either graph, the area of any colour is proportional to how commonly that size swell occurs.
The diagram implies that the prevailing swell direction, shown by the largest spokes, was NW, whereas the the prevailing wind blows from the NNE. 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 1.0% of the time, equivalent to 0 days. Open sea swells exceeding >3m (>10ft) are unlikely to happen in a normal September. Taking into account the proportion of these swells that coincided with expected offshore winds, and given the fact that Anaehoomalu Bay_A-Bay is slightly protected from open water swells, we calculate that clean surf can be found at Anaehoomalu Bay_A-Bay about 1.0% of the time and that surf is spoilt by onshore wind 1.0% of the time. This is means that we expect 1 days with waves in a typical September, of which 0 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.