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Chuns and Jocks Reefs ratings
Quality on a good day: 4.0
Consistency of Surf: 5.0
Difficulty Level: 3.0
Crowds: 2.0

Overall: 4.0

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Surf Report Feed

Chuns and Jocks Reefs Swell Statistics, October: Surf with Light or Offshore Winds

This image shows only the swells directed at Chuns and Jocks Reefs that coincided with light winds or offshore conditions through a typical October. It is based on 2480 predictions, one every 3 hours. The direction of the spokes show where quality surf generating swell comes from. Five colours illustrate increasing wave sizes. Blue shows the smallest swells, less that 0.5m (1.5 feet) high. Green and yellow represent increasing swell sizes and red illustrates the largest swells, greater than >3m (>10ft). In each graph, the area of any colour is proportional to how often that size swell happens.

The diagram indicates that the most common swell direction, shown by the longest spokes, was NNW, whereas the the most common wind blows from the E. 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 50% of the time, equivalent to 16 days. Open sea swells exceeding >3m (>10ft) are unlikely to arise in a normal October but 29% of the time we expect swell in the range 2-3m (6.5-10ft) 29%, equivalent to (9 days). Taking into account the ratio of these swells that coincided with expected offshore winds, and given the fact that Chuns and Jocks Reefs is exposed to open water swells, we estimate that clean surf can be found at Chuns and Jocks Reefs about 50% of the time and that surf is spoilt by onshore wind 8% of the time. This is means that we expect 18 days with waves in a typical October, of which 16 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.