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Surfing, Ajo
Zarautz ratings
Quality on a good day: 3.4
Consistency of Surf: 3.8
Difficulty Level: 2.9
Wind and Kite Surfing: 1.4
Crowds: 2.1

Overall: 3.5

See all 18 ratings

Based on 14 votes. Vote


Surf Report Feed

Zarautz Swell Statistics, December: Surf with Light or Offshore Winds

This image shows only the swells directed at Zarautz that coincided with light winds or offshore conditions through a typical December and is based upon 2705 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 red represents the biggest 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 prevailing swell direction, shown by the largest spokes, was NW, whereas the the prevailing wind blows from the S. 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 51% of the time, equivalent to 15 days. Open water swells exceeding >3m (>10ft) only happen 4% of the time in a typical December, equivalent to just one day but 19% of the time we expect swell in the range 2-3m (6.5-10ft) 19%, equivalent to (6 days). Taking into account the fraction of these swells that coincided with expected offshore winds, and given the fact that Zarautz is exposed to open water swells, we estimate that clean surf can be found at Zarautz about 51% of the time and that surf is spoilt by onshore wind 42% of the time. This is means that we expect 28 days with waves in a typical December, of which 15 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.