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Porthmeor ratings
Quality on a good day: 3.0
Consistency of Surf: 3.0
Difficulty Level: 3.0

Overall: 3.2

See all 18 ratings

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Surf Report Feed

Porthmeor Swell Statistics, March: Surf with Light or Offshore Winds

This image shows only the swells directed at Porthmeor that coincided with light winds or offshore conditions over a normal March and is based upon 2716 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 illustrate increasing swell sizes and red shows highest swells greater than >3m (>10ft). In each graph, the area of any colour is proportional to how often that size swell happens.

The diagram indicates that the prevailing swell direction, shown by the longest spokes, was W (which was the same as the dominant wind direction). 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 25% of the time, equivalent to 8 days. Open water swells exceeding >3m (>10ft) only arise 2% of the time in a typical March, equivalent to just one day but 12% of the time we expect swell in the range 2-3m (6.5-10ft) 12%, equivalent to (4 days). Taking into account the ratio of these swells that coincided with forecast offshore winds, and given the fact that Porthmeor is slightly protected from open water swells, we think that that clean surf can be found at Porthmeor about 25% of the time and that surf is spoilt by onshore wind 47% of the time. This is means that we expect 22 days with waves in a typical March, of which 8 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.