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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, Hiver: 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 winter. It is based on 8738 predictions, one every 3 hours. The direction of the spokes show where quality surf generating swell comes from. Five colours represent increasing wave sizes. Very small swells of less than 0.5m (1.5 feet) high are shown in blue. Green and yellow represent increasing swell sizes and red represents largest swells greater than >3m (>10ft). In each graph, the area of any colour is proportional to how commonly that size swell occurs.

The diagram implies that the dominant swell direction, shown by the largest spokes, was WSW, whereas the the most common wind blows from the NNE. 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 47% of the time, equivalent to 43 days. Expect open water swells to exceed >3m (>10ft) 2% of the time (2 days). Taking into account the ratio 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 47% of the time and that surf is messed up by onshore wind 52% of the time. This is means that we expect 90 days with waves in a typical southern hemisphere winter, of which 43 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.