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Cat Bay (Shelly Beach) ratings
Quality on a good day: 4.1
Consistency of Surf: 3.9
Difficulty Level: 1.7
Wind and Kite Surfing: 2.5
Crowds: 3.2

Overall: 3.8

See all 18 ratings

Based on 7 votes. Vote


Surf Report Feed

Cat Bay (Shelly Beach) Surf Stats

All swells

(any wind direction)
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Good Surf

(light / offshore wind)

This chart shows the variation of swells directed at Cat Bay (Shelly Beach) through an average April and is based upon 3360 NWW3 model predictions since 2007 (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 Cat Bay (Shelly Beach). In this particular case the best grid node is 12 km away (7 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 happened only 4% of the time. Green and yellow show increasing swell sizes and red represents biggest swells greater than >3m (>10ft). In either graph, the area of any colour is proportional to how frequently that size swell occurs. The diagram suggests that the prevailing swell direction, shown by the largest spokes, was SW, whereas the the prevailing wind blows from the W. Because the wave model grid is offshore, sometimes a strong offshore wind blows largest waves away from Cat Bay (Shelly Beach) and away from the coast. We group these with the no surf category of the bar chart. To avoid confusion we don't show these in the rose graph. Because wind determines whether or not waves are good for surfing at Cat Bay (Shelly Beach), you can view an alternative image that shows only the swells that were predicted to coincide with glassy or offshore wind conditions. In a typical April, swells large enough to cause clean enough to surf waves at Cat Bay (Shelly Beach) run for about 14% of the time.

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Also see Cat Bay (Shelly Beach) wind stats

Compare Cat Bay (Shelly Beach) with another surf break

We hope you find the new 12-day forecasts and additional details useful.

Kudos to everyone who helped us debug this over the past 3 months.

Be sure to click on the Advanced Surf option to see extra details about the sea-state. Look out for crossing swells and short period local wind swells and chop that will often spoil a groundswell even if the wind is perfect. As yet there is no allowance for this in the swell rating. This is something we are working on.