Waves and weather
Forecasts & radar
NSW weather & warnings: http://www.bom.gov.au/weather/nsw/
Sydney forecast: http://www.bom.gov.au/products/IDN10064.shtml
Sydney radar: http://www.bom.gov.au/products/IDR713.loop.shtml#skip
Newcastle radar: http://www.bom.gov.au/products/IDR043.loop.shtml
Waves & Tides
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