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Jack beach ratings
Quality on a good day: 3.5
Consistency of Surf: 4.5
Difficulty Level: 1.0
Wind and Kite Surfing: 1.0
Crowds: 3.5

Overall: 3.9

See all 18 ratings

Based on 2 votes. Vote


Surf Report Feed

Jack beach Swell Statistics, October: Surf with Light or Offshore Winds

This image shows only the swells directed at Jack beach that coincided with light winds or offshore conditions over a normal October. It is based on 2976 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 show increasing swell sizes and red illustrates the largest swells, greater than >3m (>10ft). In either graph, the area of any colour is proportional to how commonly that size swell occurs.

The diagram implies that the dominant swell direction, shown by the largest spokes, was NW, whereas the the most common wind blows from the N. 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 35% of the time, equivalent to 11 days. Open sea swells exceeding >3m (>10ft) are unlikely to happen in a normal October but 6% of the time we expect swell in the range 2-3m (6.5-10ft) 6%, equivalent to (2 days). Taking into account the fraction of these swells that coincided with predicted offshore winds, and given the fact that Jack beach is exposed to open water swells, we calculate that clean surf can be found at Jack beach about 35% of the time and that surf is messed up by onshore wind 64% of the time. This is means that we expect 31 days with waves in a typical October, of which 11 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.