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Ballyhiernan Bay Surf Stats

All swells

(any wind direction)
Ballyhiernan bay.surf.statistics.mayNnw.animatedNnw.label.animated

Good Surf

(light / offshore wind)

This image describes the combination of swells directed at Ballyhiernan Bay over a normal May and is based upon 3440 NWW3 model predictions since 2007 (values every 3 hours). The wave model does not forecast wind or surf right at the coast so we have chosen the most applicable grid node based on what we know about Ballyhiernan Bay. In this particular case the best grid node is 33 km away (21 miles). The rose diagram describes the distribution of swell directions and swell sizes, while the graph at the bottom shows the same thing without direction information. Five colours represent increasing wave sizes. Very small swells of less than 0.5m (1.5 feet) high are shown in blue. These happened only 55% of the time. Green and yellow illustrate increasing swell sizes and highest swells greater than >3m (>10ft) are shown in red. In both graphs, the area of any colour is proportional to how often that size swell occurs. The diagram indicates that the most common swell direction, shown by the largest spokes, was NW, whereas the the dominant wind blows from the SSW. Because the wave model grid is out to sea, sometimes a strong offshore wind blows largest waves away from Ballyhiernan Bay and offshore. We group these with the no surf category of the bar chart. To simplify things we don't show these in the rose plot. Because wind determines whether or not waves are good for surfing at Ballyhiernan Bay, you can load a different image that shows only the swells that were forecast to coincide with glassy or offshore wind conditions. During a typical May, swells large enough to cause clean enough to surf waves at Ballyhiernan Bay run for about 45% of the time.

  • Ballyhiernan bay.surf.statistics.januaryNnw.animated
  • Ballyhiernan bay.surf.statistics.februaryNnw.animated
  • Ballyhiernan bay.surf.statistics.marchNnw.animated
  • Ballyhiernan bay.surf.statistics.aprilNnw.animated
  • Ballyhiernan bay.surf.statistics.mayNnw.animated
  • Ballyhiernan bay.surf.statistics.juneNnw.animated
  • Ballyhiernan bay.surf.statistics.julyNnw.animated
  • Ballyhiernan bay.surf.statistics.augustNnw.animated
  • Ballyhiernan bay.surf.statistics.septemberNnw.animated
  • Ballyhiernan bay.surf.statistics.octoberNnw.animated
  • Ballyhiernan bay.surf.statistics.novemberNnw.animated
  • Ballyhiernan bay.surf.statistics.decemberNnw.animated

Also see Ballyhiernan Bay wind stats

Compare Ballyhiernan Bay with another surf break