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

Général: 2.7

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Surf Report Feed

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

This image shows only the swells directed at Mahia Reef that coincided with light winds or offshore conditions through a typical September. It is based on 2400 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 red shows highest swells greater than >3m (>10ft). In both graphs, the area of any colour is proportional to how commonly that size swell happens.

The diagram implies that the dominant swell direction, shown by the largest spokes, was S, whereas the the dominant wind blows from the NW. 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 but 5% of the time we expect swell in the range 2-3m (6.5-10ft) 5%, equivalent to (2 days). Taking into account the fraction of these swells that coincided with forecast offshore winds, and given the fact that Mahia Reef is quite sheltered from open water swells, we calculate that clean surf can be found at Mahia Reef about 5% of the time and that surf is spoilt by onshore wind 14% of the time. This is means that we expect 6 days with waves in a typical September, of which 2 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.