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Itaipu Surf Stats

All swells

(any wind direction)
Itaipu rio.surf.statistics.novemberSw.animatedSw.label.animated

Good Surf

(light / offshore wind)

The figure illustrates the variation of swells directed at Itaipu through a typical November and is based upon 3347 NWW3 model predictions since 2006 (values every 3 hours). The wave model does not forecast wind and surf right at the coast so we have chosen the optimum grid node based on what we know about Itaipu. In this particular case the best grid node is 5 km away (3 miles). The rose diagram describes the distribution of swell sizes and swell direction, 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 occurred only 60% of the time. Green and yellow illustrate 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 commonly that size swell was forecast. The diagram implies that the most common swell direction, shown by the largest spokes, was S, whereas the the most common wind blows from the ESE. Because the wave model grid is out to sea, sometimes a strong offshore wind blows largest waves away from Itaipu and offshore. We lump these in with the no surf category of the bar chart. To simplify things we don't show these in the rose diagram. Because wind determines whether or not waves are clean enough to surf at Itaipu, you can load a different image that shows only the swells that were expected to coincide with glassy or offshore wind conditions. Over an average November, swells large enough to cause surfable waves at Itaipu run for about 40% of the time.

  • Itaipu rio.surf.statistics.januarySw.animated
  • Itaipu rio.surf.statistics.februarySw.animated
  • Itaipu rio.surf.statistics.marchSw.animated
  • Itaipu rio.surf.statistics.aprilSw.animated
  • Itaipu rio.surf.statistics.maySw.animated
  • Itaipu rio.surf.statistics.juneSw.animated
  • Itaipu rio.surf.statistics.julySw.animated
  • Itaipu rio.surf.statistics.augustSw.animated
  • Itaipu rio.surf.statistics.septemberSw.animated
  • Itaipu rio.surf.statistics.octoberSw.animated
  • Itaipu rio.surf.statistics.novemberSw.animated
  • Itaipu rio.surf.statistics.decemberSw.animated

Also see Itaipu wind stats

Compare Itaipu with another surf break