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Surf local avaliação

Avaliar Barra de Guaratiba


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Barra de Guaratiba Swell Statistics, All Year: All Swell – Any Wind

This image illustrates the variation of swells directed at Barra de Guaratiba through an average year. It is based on 34628 NWW3 model predictions since 2006 (values every 3 hours). The wave model does not forecast surf and wind right at the shore so we have chosen the optimum grid node based on what we know about Barra de Guaratiba. In the case of Barra de Guaratiba, the best grid node is 59 km away (37 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 show increasing wave sizes. The smallest swells, less than 0.5m (1.5 feet), high are coloured blue. These happened only 36% of the time. Green and yellow show increasing swell sizes and largest swells greater than >3m (>10ft) are shown in red. In either 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 biggest spokes, was S, whereas the the most common wind blows from the ENE. Because the wave model grid is away from the coast, sometimes a strong offshore wind blows largest waves away from Barra de Guaratiba and out to sea. We group 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 Barra de Guaratiba, you can view an alternative image that shows only the swells that were expected to coincide with glassy or offshore wind conditions. In a typical year, swells large enough to cause good for surfing waves at Barra de Guaratiba run for about 32% of the time.

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.