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Backdoor avaliaçãos
Qualidade em um dia bom: 3.5
Consistência do surf: 5.0
Nível de dificuldade: 3.5
Windsurf e kite surf: 5.0
Multidões: 2.5

Overall: 3.9

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Baseado em 2 votes. Vote


Surf Report Feed

Backdoor Swell Statistics, Autumn: Surf with Light or Offshore Winds

This image shows only the swells directed at Backdoor that coincided with light winds or offshore conditions through a typical northern hemisphere autumn. It is based on 8724 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 the biggest swells, greater than >3m (>10ft). In either graph, the area of any colour is proportional to how frequently that size swell happens.

The diagram suggests that the dominant swell direction, shown by the largest spokes, was WNW, whereas the the prevailing wind blows from the NNW. 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 26% of the time, equivalent to 24 days. Open water swells exceeding >3m (>10ft) only arise 1.0% of the time in a typical northern hemisphere autumn, equivalent to just one day but 7% of the time we expect swell in the range 2-3m (6.5-10ft) 7%, equivalent to (6 days). Taking into account the fraction of these swells that coincided with forecast offshore winds, and given the fact that Backdoor is exposed to open water swells, we calculate that clean surf can be found at Backdoor about 26% of the time and that surf is spoilt by onshore wind 71% of the time. This is means that we expect 88 days with waves in a typical northern hemisphere autumn, of which 24 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.