A short stripy curve of the same period energy is preferable to a big blotch over a range of periods and directions.
These images are direct from Manly Hydraulics Laboratory and together they provide an overview of the swell on the whole NSW coast.
For a fuller explanation of Directional Spectra see: ssurfings.blogspot.com.au/2014/02/mhl-directional-spectra-translated.html Click the graphic you are interested in to go to that MHL page. Note the graphs at the bottom of the page.
From North to SouthByron Bay
If you see weird or blank graphs it usually means that the buoy is malfunctioning or adrift. For information about these wave rider buoys see: mhl.nsw.gov.au/data/realtime/wave ..but wait there is more
NSW Nearshore Wave Forecast - Wave Data + Forecast
This is both a record of recent readings (the last 6 days) and three days of forecasts.
It provides transformed wave data based on offshore wave conditions from the NSW Waverider buoy network combined with NOAA's WAVEWATCH III model.
[The data generation is automated]