Augusta Rivermouth Swell Statistics, June: Surf with Light or Offshore Winds
This image shows only the swells directed at Augusta Rivermouth that coincided with light winds or offshore conditions over a normal June and is based upon 2306 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 red represents the biggest swells, greater than >3m (>10ft). In both graphs, the area of any colour is proportional to how frequently that size swell was forecast.
The diagram suggests that the dominant swell direction, shown by the biggest spokes, was SSW, whereas the the prevailing 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 8% of the time, equivalent to 2 days. Open water swells exceeding >3m (>10ft) only occur 2% of the time in a typical June, equivalent to just one day but 5% of the time we expect swell in the range 2-3m (6.5-10ft) 5%, equivalent to (2 days). Taking into account the proportion of these swells that coincided with predicted offshore winds, and given the fact that Augusta Rivermouth is slightly protected from open water swells, we calculate that clean surf can be found at Augusta Rivermouth about 8% of the time and that surf is spoilt by onshore wind 12% of the time. This is means that we expect 6 days with waves in a typical June, of which 2 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.