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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, October: All Swell – Any Wind

The rose diagram describes the variation of swells directed at Whitsand Bay and Tregantle through an average October, based on 2976 NWW3 model predictions since 2006 (values every 3 hours). The wave model does not forecast wind and surf right at the shore so we have chosen the optimum grid node based on what we know about Whitsand Bay and Tregantle, and at Whitsand Bay and Tregantle the best grid node is 42 km away (26 miles).

The rose diagram illustrates the distribution of swell sizes and directions, 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 were forecast only 20% of the time. Green and yellow show increasing swell sizes and highest swells greater than >3m (>10ft) are shown in red. In both graphs, 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 largest spokes, was WSW, whereas the the dominant wind blows from the SW. Because the wave model grid is away from the coast, sometimes a strong offshore wind blows largest waves away from Whitsand Bay and Tregantle and out to sea. We combine these with the no surf category of the bar chart. To simplify things we don't show these in the rose plot. Because wind determines whether or not waves are good for surfing at Whitsand Bay and Tregantle, you can load a different image that shows only the swells that were forecast to coincide with glassy or offshore wind conditions. In a typical October, swells large enough to cause clean enough to surf 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.