NSW offshore wave heights: http://www.mhl.nsw.gov.au/www/wave_map.htmlx
Sydney wave height chart: http://www.mhl.nsw.gov.au/htbin/wave_data_plot.com?Location=Sydney
Umina Beach Tide Times: http://tide-times.com.au/localtime_NSW/Central_Coast/Beaches/Umina_Beach...
NSW Maritime Tide Tables: http://www.maritime.nsw.gov.au/docs/Tide_Tables.pdf