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Whitsand Bay and Tregantle ratings
Quality on a good day: 3.0
Consistency of Surf: 2.0
Difficulty Level: 2.7
Wind and Kite Surfing: 2.5
Crowds: 2.0

Overall: 2.3

See all 18 ratings

Based on 3 votes. Vote


Surf Report Feed

Whitsand Bay and Tregantle Swell Statistics, July: All Swell – Any Wind

The rose diagram shows the combination of swells directed at Whitsand Bay and Tregantle over a normal July. It is based on 2976 NWW3 model predictions since 2006 (values every 3 hours). The wave model does not forecast wind or surf right at the coastline so we have chosen the optimum grid node based on what we know about Whitsand Bay and Tregantle. In this particular case the best grid node is 42 km away (26 miles).

The rose diagram illustrates the distribution of swell directions and swell sizes, while the graph at the bottom shows the same thing but 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 20% of the time. Green and yellow illustrate increasing swell sizes and red shows biggest swells greater than >3m (>10ft). In both graphs, the area of any colour is proportional to how commonly that size swell happens.

The diagram implies that the prevailing swell direction, shown by the biggest spokes, was WSW (which was the same as the prevailing wind direction). Because the wave model grid is out to sea, sometimes a strong offshore wind blows largest waves away from Whitsand Bay and Tregantle 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 graph. Because wind determines whether or not waves are clean enough to surf at Whitsand Bay and Tregantle, you can view an alternative image that shows only the swells that were expected to coincide with glassy or offshore wind conditions. During a typical July, swells large enough to cause surfable waves at Whitsand Bay and Tregantle run for about 80% 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.