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Grishipoll Bay (Coll) Surf Stats

All swells

(any wind direction)
Grishipoll bay.surf.statistics.mayNw.animatedNw.label.animated

Good Surf

(light / offshore wind)

The graph illustrates the variation of swells directed at Grishipoll Bay (Coll) over a normal May and is based upon 3366 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 optimum grid node based on what we know about Grishipoll Bay (Coll). In this particular case the best grid node is 18 km away (11 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 illustrate increasing wave sizes. Blue shows the smallest swells, less that 0.5m (1.5 feet) high. These occurred 42% of the time. Green and yellow represent increasing swell sizes and red shows the largest swells, greater than >3m (>10ft). In both graphs, the area of any colour is proportional to how often that size swell was forecast. The diagram indicates that the prevailing swell direction, shown by the largest spokes, was WNW, whereas the the most common wind blows from the SW. Because the wave model grid is away from the coast, sometimes a strong offshore wind blows largest waves away from Grishipoll Bay (Coll) and out to sea. We combine these with the no surf category of the bar chart. To keep it simple we don't show these in the rose diagram. Because wind determines whether or not waves are surfable at Grishipoll Bay (Coll), you can view an alternative 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 good for surfing waves at Grishipoll Bay (Coll) run for about 58% of the time.

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  • Grishipoll bay.surf.statistics.aprilNw.animated
  • Grishipoll bay.surf.statistics.mayNw.animated
  • Grishipoll bay.surf.statistics.juneNw.animated
  • Grishipoll bay.surf.statistics.julyNw.animated
  • Grishipoll bay.surf.statistics.augustNw.animated
  • Grishipoll bay.surf.statistics.septemberNw.animated
  • Grishipoll bay.surf.statistics.octoberNw.animated
  • Grishipoll bay.surf.statistics.novemberNw.animated
  • Grishipoll bay.surf.statistics.decemberNw.animated

Also see Grishipoll Bay (Coll) wind stats

Compare Grishipoll Bay (Coll) with another surf break