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Notation de Spot de Surf

Noter JD Reef


Surf Report Feed

Statistiques de Houle pour JD Reef, Avril: 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 April. It is based on 2160 predictions, one every 3 hours. The direction of the spokes show where quality surf generating swell comes from. Five colours show increasing wave sizes. The smallest swells, less than 0.5m (1.5 feet), high are coloured blue. Green and yellow represent increasing swell sizes and highest swells greater than >3m (>10ft) are shown in red. In either graph, the area of any colour is proportional to how often that size swell was forecast.

The diagram indicates that the most common swell direction, shown by the longest spokes, was SSE, whereas the the dominant wind blows from the SSW. 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 50% of the time, equivalent to 15 days. Open water swells exceeding >3m (>10ft) only occur 3% of the time in a typical April, equivalent to just one day but 20% of the time we expect swell in the range 2-3m (6.5-10ft) 20%, equivalent to (6 days). Taking into account the ratio of these swells that coincided with predicted offshore winds we estimate that clean surf can be found at JD Reef about 50% of the time and that surf is messed up by onshore wind 26% of the time. This is means that we expect 23 days with waves in a typical April, of which 15 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.