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Notation de Spot de Surf

Noter JD Reef


Surf Report Feed

Statistiques de Houle pour JD Reef, Août: Vagues avec Vents Légers ou Favorables.

This image shows only the swells directed at JD Reef that coincided with light winds or offshore conditions over a normal August. It is based on 2480 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 illustrate increasing swell sizes and red illustrates the highest swells, greater than >3m (>10ft). In either graph, 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 SSE, whereas the the dominant wind blows from the W. 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 39% of the time, equivalent to 12 days. Open water swells exceeding >3m (>10ft) only happen 2% of the time in a typical August, equivalent to just one day but 11% of the time we expect swell in the range 2-3m (6.5-10ft) 11%, equivalent to (3 days). Taking into account the proportion of these swells that coincided with predicted offshore winds we estimate that clean surf can be found at JD Reef about 39% of the time and that surf is messed up by onshore wind 33% of the time. This is means that we expect 22 days with waves in a typical August, of which 12 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.