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Arrifana ratings
Quality on a good day: 3.8
Consistency of Surf: 3.7
Difficulty Level: 3.3
Wind and Kite Surfing: 1.2
Crowds: 2.7

Overall: 3.2

See all 18 ratings

Based on 6 votes. Vote


Surf Report Feed

Arrifana Swell Statistics, Summer: Surf with Light or Offshore Winds

This image shows only the swells directed at Arrifana that coincided with light winds or offshore conditions over a normal northern hemisphere summer. It is based on 7266 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 represents highest swells greater than >3m (>10ft). In each graph, the area of any colour is proportional to how commonly that size swell was forecast.

The diagram implies that the dominant swell direction, shown by the largest spokes, was NW, whereas the the dominant 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 23% of the time, equivalent to 21 days. Open sea swells exceeding >3m (>10ft) are unlikely to occur in a normal northern hemisphere summer but 1.7% of the time we expect swell in the range 2-3m (6.5-10ft) 1.7%, equivalent to (2 days). Taking into account the proportion of these swells that coincided with forecast offshore winds, and given the fact that Arrifana is slightly protected from open water swells, we think that that clean surf can be found at Arrifana about 23% of the time and that surf is blown out by onshore wind 23% of the time. This is means that we expect 42 days with waves in a typical northern hemisphere summer, of which 21 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.