uk es it fr pt nl
Catlins River Mouth ratings
Quality on a good day: 4.0
Consistency of Surf: 3.0
Difficulty Level: 1.0
Crowds: 4.0

Overall: 3.3

See all 18 ratings

Based on 1 vote. Vote


Surf Report Feed

Catlins River Mouth Swell Statistics, August: Surf with Light or Offshore Winds

This image shows only the swells directed at Catlins River Mouth that coincided with light winds or offshore conditions over a normal August and is based upon 2480 predictions, one every 3 hours. The direction of the spokes show where quality surf generating swell comes from. Five colours show increasing wave sizes. The smallest swells, less than 0.5m (1.5 feet), high are coloured 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 commonly that size swell was forecast.

The diagram implies that the most common swell direction, shown by the longest spokes, was S, whereas the the dominant wind blows from the NW. 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 25% of the time, equivalent to 8 days. Open sea swells exceeding >3m (>10ft) are unlikely to occur in a normal August but 8% of the time we expect swell in the range 2-3m (6.5-10ft) 8%, equivalent to (2 days). Taking into account the ratio of these swells that coincided with predicted offshore winds, and given the fact that Catlins River Mouth is slightly protected from open water swells, we calculate that clean surf can be found at Catlins River Mouth about 25% of the time and that surf is messed up by onshore wind 28% of the time. This is means that we expect 16 days with waves in a typical August, of which 8 days should be clean enough to surf.

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.