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Derrs Notations
Qualité quand ça marche: 2.0
Consistance des Vagues: 4.0
Niveau de Difficulté: 1.0
Foule a l'Eau: 3.0

Général: 2.8

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Surf Report Feed

Statistiques de Houle pour Derrs, Automne: Vagues avec Vents Légers ou Favorables.

This image shows only the swells directed at Derrs that coincided with light winds or offshore conditions through a typical southern hemisphere autumn and is based upon 8052 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 red shows largest swells greater than >3m (>10ft). In each graph, the area of any colour is proportional to how frequently that size swell was forecast.

The diagram suggests that the dominant swell direction, shown by the largest spokes, was SW, whereas the the most common 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 43% of the time, equivalent to 39 days. Open water swells exceeding >3m (>10ft) only occur 0.8% of the time in a typical southern hemisphere autumn, equivalent to just one day but 9% of the time we expect swell in the range 2-3m (6.5-10ft) 9%, equivalent to (8 days). Taking into account the fraction of these swells that coincided with predicted offshore winds, and given the fact that Derrs is exposed to open water swells, we calculate that clean surf can be found at Derrs about 43% of the time and that surf is blown out by onshore wind 57% of the time. This is means that we expect 91 days with waves in a typical southern hemisphere autumn, of which 39 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.