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I and Js Surf Stats

All swells

(any wind direction)
I and js.surf.statistics.novemberW.animatedW.label.animated

Good Surf

(light / offshore wind)

This chart describes the variation of swells directed at I and Js over a normal November. It is based on 3347 NWW3 model predictions since 2006 (values every 3 hours). The wave model does not forecast wind or surf right at the shore so we have chosen the optimum grid node based on what we know about I and Js. In the case of I and Js, the best grid node is 35 km away (22 miles). The rose diagram shows the distribution of swell sizes and directions, while the graph at the bottom shows the same thing but lacks direction information. Five colours illustrate increasing wave sizes. Blue shows the smallest swells, less that 0.5m (1.5 feet) high. These happened only 24% of the time. Green and yellow represent increasing swell sizes and highest swells greater than >3m (>10ft) are shown in red. In either 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 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 I and Js 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 graph. Because wind determines whether or not waves are good for surfing at I and Js, you can load a different image that shows only the swells that were predicted to coincide with glassy or offshore wind conditions. During a typical November, swells large enough to cause clean enough to surf waves at I and Js run for about 76% of the time.

  • I and js.surf.statistics.januaryW.animated
  • I and js.surf.statistics.februaryW.animated
  • I and js.surf.statistics.marchW.animated
  • I and js.surf.statistics.aprilW.animated
  • I and js.surf.statistics.mayW.animated
  • I and js.surf.statistics.juneW.animated
  • I and js.surf.statistics.julyW.animated
  • I and js.surf.statistics.augustW.animated
  • I and js.surf.statistics.septemberW.animated
  • I and js.surf.statistics.octoberW.animated
  • I and js.surf.statistics.novemberW.animated
  • I and js.surf.statistics.decemberW.animated

Also see I and Js wind stats

Compare I and Js with another surf break