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Notation de Spot de Surf

Noter Donabate


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Statistiques de Houle pour Donabate, Septembre: Vagues avec Vents Légers ou Favorables.

This image shows only the swells directed at Donabate that coincided with light winds or offshore conditions over a normal September and is based upon 2878 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 illustrate 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 commonly that size swell happens.

The diagram implies that the most common swell direction, shown by the longest spokes, was S, whereas the the dominant wind blows from the WSW. 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 5% of the time, equivalent to 2 days. Open sea swells exceeding >3m (>10ft) are unlikely to arise in a normal September. Taking into account the ratio of these swells that coincided with expected offshore winds we estimate that clean surf can be found at Donabate about 5% of the time and that surf is spoilt by onshore wind 31% of the time. This is means that we expect 11 days with waves in a typical September, of which 2 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.