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Gonubie Reef (The Lefts) ratings
Quality on a good day: 5.0
Consistency of Surf: 5.0
Difficulty Level: 3.0
Crowds: 4.0

Overall: 4.2

See all 18 ratings

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Surf Report Feed

Gonubie Reef (The Lefts) Swell Statistics, January: All Swell – Any Wind

This picture shows the combination of swells directed at Gonubie Reef (The Lefts) through a typical January. It is based on 2868 NWW3 model predictions since 2007 (values every 3 hours). The wave model does not forecast surf and wind right at the shore so we have chosen the most applicable grid node based on what we know about Gonubie Reef (The Lefts). In the case of Gonubie Reef (The Lefts), the best grid node is 19 km away (12 miles).

The rose diagram describes the distribution of swell sizes and directions, while the graph at the bottom shows the same thing but without direction information. Five colours illustrate increasing wave sizes. Blue shows the smallest swells, less that 0.5m (1.5 feet) high. These happened only 41% of the time. Green and yellow represent increasing swell sizes and biggest swells greater than >3m (>10ft) are shown in red. In either graph, the area of any colour is proportional to how frequently that size swell occurs.

The diagram suggests that the most common swell direction, shown by the longest spokes, was S, whereas the the prevailing wind blows from the SE. Because the wave model grid is out to sea, sometimes a strong offshore wind blows largest waves away from Gonubie Reef (The Lefts) and offshore. We lump these in with the no surf category of the bar chart. To keep it simple we don't show these in the rose graph. Because wind determines whether or not waves are clean enough to surf at Gonubie Reef (The Lefts), you can load a different image that shows only the swells that were expected to coincide with glassy or offshore wind conditions. Over an average January, swells large enough to cause surfable waves at Gonubie Reef (The Lefts) run for about 59% 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.