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Dunedin - St Kilda Beach Surf Stats

All swells

(any wind direction)
St kilda beach.surf.statistics.julyS.animatedS.label.animated

Good Surf

(light / offshore wind)

The rose diagram describes the combination of swells directed at Dunedin - St Kilda Beach through a typical July, based on 3472 NWW3 model predictions since 2006 (values every 3 hours). The wave model does not forecast surf and wind right at the coast so we have chosen the most applicable grid node based on what we know about Dunedin - St Kilda Beach. In this particular case the best grid node is 10 km away (6 miles). The rose diagram describes the distribution of swell sizes and swell direction, 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 32% of the time. Green and yellow represent increasing swell sizes and red illustrates the highest swells, greater than >3m (>10ft). In each graph, the area of any colour is proportional to how commonly that size swell happens. The diagram implies that the dominant swell direction, shown by the longest spokes, was S, whereas the the dominant wind blows from the NW. Because the wave model grid is out to sea, sometimes a strong offshore wind blows largest waves away from Dunedin - St Kilda Beach and offshore. We combine these with the no surf category of the bar chart. To avoid confusion we don't show these in the rose diagram. Because wind determines whether or not waves are clean enough to surf at Dunedin - St Kilda Beach, you can load a different image that shows only the swells that were forecast to coincide with glassy or offshore wind conditions. Over an average July, swells large enough to cause surfable waves at Dunedin - St Kilda Beach run for about 68% of the time.

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Also see Dunedin - St Kilda Beach wind stats

Compare Dunedin - St Kilda Beach with another surf break