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Cardiff Reef ratings
Quality on a good day: 3.3
Consistency of Surf: 4.0
Difficulty Level: 3.0
Wind and Kite Surfing: 1.0
Crowds: 2.3

Overall: 3.2

See all 18 ratings

Based on 5 votes. Vote


Surf Report Feed

Cardiff Reef Swell Statistics, November: Surf with Light or Offshore Winds

This image shows only the swells directed at Cardiff Reef that coincided with light winds or offshore conditions through a typical November. It is based on 2867 predictions, one every 3 hours. The direction of the spokes show where quality surf generating swell comes from. Five colours represent increasing wave sizes. Very small swells of less than 0.5m (1.5 feet) high are shown in blue. Green and yellow show increasing swell sizes and red illustrates the biggest swells, greater than >3m (>10ft). In both graphs, the area of any colour is proportional to how commonly that size swell was forecast.

The diagram implies that the prevailing swell direction, shown by the largest spokes, was W, whereas the the prevailing wind blows from the NW. 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 24% of the time, equivalent to 7 days. Open sea swells exceeding >3m (>10ft) are unlikely to occur in a normal November. Taking into account the fraction of these swells that coincided with forecast offshore winds, and given the fact that Cardiff Reef is exposed to open water swells, we estimate that clean surf can be found at Cardiff Reef about 24% of the time and that surf is spoilt by onshore wind 15% of the time. This is means that we expect 12 days with waves in a typical November, of which 7 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.

FEATURE UPDATE: we now show red swell icons for 'open sea' swells that are travelling in an unfavourable direction for the surf break. In places, these swells may still wrap around coastlines and produce smaller waves at some breaks. They are also significant for windsurfers and other water users that tend to venture further off-shore.