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San Onofre ratings
Quality on a good day: 3.8
Consistency of Surf: 4.3
Difficulty Level: 2.0
Wind and Kite Surfing: 2.0
Crowds: 2.7

Overall: 3.4

See all 18 ratings

Based on 6 votes. Vote


Surf Report Feed

San Onofre Swell Statistics, October: Surf with Light or Offshore Winds

This image shows only the swells directed at San Onofre that coincided with light winds or offshore conditions over a normal October. 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 illustrate increasing wave sizes. Blue shows the smallest swells, less that 0.5m (1.5 feet) high. Green and yellow illustrate increasing swell sizes and red illustrates the biggest swells, greater than >3m (>10ft). In each graph, the area of any colour is proportional to how frequently that size swell happens.

The diagram suggests that the most common swell direction, shown by the longest spokes, was SW, whereas the the prevailing wind blows from the WNW. 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 54% of the time, equivalent to 17 days. Open sea swells exceeding >3m (>10ft) are unlikely to arise in a normal October. Taking into account the proportion of these swells that coincided with expected offshore winds, and given the fact that San Onofre is exposed to open water swells, we estimate that clean surf can be found at San Onofre about 54% of the time and that surf is spoilt by onshore wind 43% of the time. This is means that we expect 30 days with waves in a typical October, of which 17 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.