Or check out these other great resources:

Weather Bureau
Seabreeze
Weatherzone
Coastalwatch
BoM Tide Predictions for SA

Please note: From late October 2011 the Bureau of Meteorology will begin using a new forecasting system to provide upgraded services in South Australia. This new system will result in improved content, better formats and increase in the number of forecast days for many locations. Further upgrades for South Australia will occur in autumn 2012 with the introduction of a map based viewing system and additional location based forecasts.

The changes are detailed on the following web pages where you can also access 5 explanatory brochures (2 marine) - from the right hand side menu.

Important Web Links
South Australia's improving weather services (basic outline of changes)
http://www.bom.gov.au/NexGenFWS/index.shtml
Frequently asked questions (great reference to better understand what is happening)
http://www.bom.gov.au/NexGenFWS/sa/faq.shtml