Anawhata Road (Oaonui) Swell Statistics, All Year: Surf with Light or Offshore Winds
This image shows only the swells directed at Anawhata Road (Oaonui) that coincided with light winds or offshore conditions over a normal 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 show increasing wave sizes. The smallest swells, less than 0.5m (1.5 feet), high are coloured blue. Green and yellow represent 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 frequently that size swell was forecast.
The diagram suggests that the prevailing swell direction, shown by the biggest spokes, was WSW, whereas the the prevailing wind blows from the W. 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 19% of the time, equivalent to 69 days. Open water swells exceeding >3m (>10ft) only occur 0.3% of the time in a typical year, equivalent to just one day but 5% of the time we expect swell in the range 2-3m (6.5-10ft) 5%, equivalent to (18 days). Taking into account the proportion of these swells that coincided with expected offshore winds, and given the fact that Anawhata Road (Oaonui) is exposed to open water swells, we think that that clean surf can be found at Anawhata Road (Oaonui) about 19% of the time and that surf is spoilt by onshore wind 65% of the time. This is means that we expect 307 days with waves in a typical year, of which 69 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.