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Surf Break Rating

Rate Zoo (Bull Bay)


Surf Report Feed

Zoo (Bull Bay) Swell Statistics, December: Surf with Light or Offshore Winds

This image shows only the swells directed at Zoo (Bull Bay) that coincided with light winds or offshore conditions through a typical December. It is based on 2457 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 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 ESE, whereas the the prevailing 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 13% of the time, equivalent to 4 days. Open sea swells exceeding >3m (>10ft) are unlikely to happen in a normal December. Taking into account the ratio of these swells that coincided with expected offshore winds, and given the fact that Zoo (Bull Bay) is exposed to open water swells, we estimate that clean surf can be found at Zoo (Bull Bay) about 13% of the time and that surf is blown out by onshore wind 64% of the time. This is means that we expect 23 days with waves in a typical December, of which 4 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.