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Whiritoa ratings
Quality on a good day: 4.2
Consistency of Surf: 2.8
Difficulty Level: 3.8
Wind and Kite Surfing: 2.0
Crowds: 4.2

Overall: 3.3

See all 18 ratings

Based on 7 votes. Vote


Surf Report Feed

Whiritoa Swell Statistics, Autumn: Surf with Light or Offshore Winds

This image shows only the swells directed at Whiritoa that coincided with light winds or offshore conditions through a typical southern hemisphere autumn. It is based on 8052 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 red shows largest swells greater than >3m (>10ft). In either graph, the area of any colour is proportional to how commonly that size swell happens.

The diagram implies that the prevailing swell direction, shown by the biggest spokes, was ENE, whereas the the most common wind blows from the WSW. 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 11% of the time, equivalent to 10 days. Open sea swells exceeding >3m (>10ft) are unlikely to arise in a normal southern hemisphere autumn but 2% of the time we expect swell in the range 2-3m (6.5-10ft) 2%, equivalent to (2 days). Taking into account the ratio of these swells that coincided with expected offshore winds, and given the fact that Whiritoa is slightly protected from open water swells, we think that that clean surf can be found at Whiritoa about 11% of the time and that surf is spoilt by onshore wind 23% of the time. This is means that we expect 31 days with waves in a typical southern hemisphere autumn, of which 10 days should be clean enough to surf.

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.