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Asu ratings
Quality on a good day: 4.5
Consistency of Surf: 4.0
Difficulty Level: 4.0
Wind and Kite Surfing: 1.0
Crowds: 2.5

Overall: 2.7

See all 18 ratings

Based on 2 votes. Vote


Surf Report Feed

Asu Swell Statistics, August: Surf with Light or Offshore Winds

This image shows only the swells directed at Asu that coincided with light winds or offshore conditions over a normal August. It is based on 2480 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 show increasing swell sizes and largest swells greater than >3m (>10ft) are shown in red. In both graphs, the area of any colour is proportional to how often that size swell was forecast.

The diagram indicates that the dominant swell direction, shown by the biggest spokes, was SSW, whereas the the most common wind blows from the SW. 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 73% of the time, equivalent to 23 days. Open sea swells exceeding >3m (>10ft) are unlikely to occur in a normal August but 26% of the time we expect swell in the range 2-3m (6.5-10ft) 26%, equivalent to (8 days). Taking into account the fraction of these swells that coincided with expected offshore winds, and given the fact that Asu is exposed to open water swells, we calculate that clean surf can be found at Asu about 73% of the time and that surf is messed up by onshore wind 27% of the time. This is means that we expect 31 days with waves in a typical August, of which 23 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.