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Japs ratings
Quality on a good day: 3.3
Consistency of Surf: 2.7
Difficulty Level: 3.7
Wind and Kite Surfing: 1.0
Crowds: 3.3

Overall: 3.2

See all 18 ratings

Based on 3 votes. Vote


Surf Report Feed

Japs Swell Statistics, Winter: Surf with Light or Offshore Winds

The rose diagram shows only the swells directed at Japs that coincided with light winds or offshore conditions over a normal southern hemisphere winter and is based upon 8738 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 red represents the biggest swells, greater than >3m (>10ft). In both graphs, 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 SW, whereas the the prevailing wind blows from the NW. 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 51% of the time, equivalent to 46 days. Expect open water swells to exceed >3m (>10ft) 4% of the time (4 days). Taking into account the proportion of these swells that coincided with forecast offshore winds, and given the fact that Japs is exposed to open water swells, we think that that clean surf can be found at Japs about 51% of the time and that surf is spoilt by onshore wind 43% of the time. This is means that we expect 86 days with waves in a typical southern hemisphere winter, of which 46 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.