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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, July: Surf with Light or Offshore Winds

This image shows only the swells directed at Jack beach that coincided with light winds or offshore conditions through a typical July. 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 represent increasing wave sizes. Very small swells of less than 0.5m (1.5 feet) high are shown in blue. Green and yellow represent 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 happens.

The diagram suggests that the dominant swell direction, shown by the longest spokes, was NW, whereas the the prevailing 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 18% of the time, equivalent to 6 days. Open sea swells exceeding >3m (>10ft) are unlikely to arise in a normal July but 7% of the time you can expect swell in the range 1.3-2m (4-6.5ft) 7%, 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 think that that clean surf can be found at Jack beach about 18% of the time and that surf is blown out by onshore wind 82% of the time. This is means that we expect 31 days with waves in a typical July, of which 6 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.