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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 through a typical August and is based upon 2976 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 show increasing swell sizes and red represents biggest swells greater than >3m (>10ft). In each graph, the area of any colour is proportional to how commonly that size swell was forecast.

The diagram implies that the prevailing swell direction, shown by the biggest spokes, was SSE, whereas the the prevailing 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 40% of the time, equivalent to 12 days. Open water swells exceeding >3m (>10ft) only occur 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 40% of the time and that surf is spoilt by onshore wind 35% of the time. This is means that we expect 23 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.