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Ulla ratings
Quality on a good day: 5.0
Consistency of Surf: 5.0
Difficulty Level: 4.0
Crowds: 5.0

Overall: 4.7

See all 18 ratings

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Surf Report Feed

Ulla Swell Statistics, October: Surf with Light or Offshore Winds

This image shows only the swells directed at Ulla that coincided with light winds or offshore conditions through a typical October. It is based on 2976 predictions, one every 3 hours. The direction of the spokes show where quality surf generating swell comes from. Five colours illustrate increasing wave sizes. Blue shows the smallest swells, less that 0.5m (1.5 feet) high. Green and yellow represent increasing swell sizes and red shows largest swells greater than >3m (>10ft). In both graphs, the area of any colour is proportional to how often that size swell happens.

The diagram indicates that the most common swell direction, shown by the largest spokes, was NW, whereas the the most common 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 41% of the time, equivalent to 13 days. Open sea swells exceeding >3m (>10ft) are unlikely to arise in a normal October but 7% of the time we expect swell in the range 2-3m (6.5-10ft) 7%, equivalent to (2 days). Taking into account the ratio of these swells that coincided with predicted offshore winds, and given the fact that Ulla is exposed to open water swells, we estimate that clean surf can be found at Ulla about 41% of the time and that surf is blown out by onshore wind 46% of the time. This is means that we expect 27 days with waves in a typical October, of which 13 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.