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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, Spring: 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 northern hemisphere spring and is based upon 8052 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 most common swell direction, shown by the biggest 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 24% of the time, equivalent to 22 days. Open sea swells exceeding >3m (>10ft) are unlikely to happen in a normal northern hemisphere spring but 5% of the time we expect swell in the range 2-3m (6.5-10ft) 5%, equivalent to (5 days). Taking into account the ratio 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 24% of the time and that surf is blown out by onshore wind 75% of the time. This is means that we expect 90 days with waves in a typical northern hemisphere spring, of which 22 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.