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J-Bay ratings
Quality on a good day: 4.2
Consistency of Surf: 3.7
Difficulty Level: 2.7
Wind and Kite Surfing: 1.0
Crowds: 2.7

Overall: 3.5

See all 18 ratings

Based on 6 votes. Vote


Surf Report Feed

J-Bay Swell Statistics, Spring: Surf with Light or Offshore Winds

This image shows only the swells directed at J-Bay that coincided with light winds or offshore conditions through a typical southern hemisphere spring. It is based on 8476 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 shows the biggest swells, greater than >3m (>10ft). In both graphs, the area of any colour is proportional to how frequently that size swell occurs.

The diagram suggests that the dominant swell direction, shown by the biggest spokes, was SSW, whereas the the prevailing wind blows from the SSE. 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 37% of the time, equivalent to 34 days. Expect open water swells to exceed >3m (>10ft) 11% of the time (10 days). Taking into account the ratio of these swells that coincided with forecast offshore winds, and given the fact that J-Bay is exposed to open water swells, we think that that clean surf can be found at J-Bay about 37% of the time and that surf is spoilt by onshore wind 48% of the time. This is means that we expect 77 days with waves in a typical southern hemisphere spring, of which 34 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.