uk es it fr pt nl
Clarence River ratings
Quality on a good day: 3.0
Consistency of Surf: 4.0
Crowds: 4.0

Overall: 3.8

See all 18 ratings

Based on 2 votes. Vote


Surf Report Feed

Clarence River Swell Statistics, Autumn: Surf with Light or Offshore Winds

This image shows only the swells directed at Clarence River that coincided with light winds or offshore conditions over a normal southern hemisphere autumn. It is based on 8052 predictions, one every 3 hours. The direction of the spokes show where quality surf generating swell comes from. Five colours represent increasing wave sizes. Very small swells of less than 0.5m (1.5 feet) high are shown in blue. Green and yellow represent increasing swell sizes and highest 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 happens.

The diagram suggests that the prevailing swell direction, shown by the largest spokes, was SE, whereas the the dominant wind blows from the NNW. The chart at the bottom shows the same thing but without direction information. For example, swells larger than 1.5 feet (0.5m) coincided with good wind conditions 39% of the time, equivalent to 35 days. Expect open water swells to exceed >3m (>10ft) 3% of the time (3 days). Taking into account the ratio of these swells that coincided with forecast offshore winds, and given the fact that Clarence River is exposed to open water swells, we estimate that clean surf can be found at Clarence River about 39% of the time and that surf is spoilt by onshore wind 35% of the time. This is means that we expect 67 days with waves in a typical southern hemisphere autumn, of which 35 days should be surfable.

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.