There is a great weather site at:
www.buoyweather.com
Go to "Virtual buoys", click on the world map, and then the local area virtual buoy you want, anywhere on the coast - 7 day forecast coming up - fantastic!!!
This is different data to the BOM links from Seabreeze and the stuff on Ocean Outlook, so can be interesting for another opinion. Note the locations are a bit offshore so may not reflect what is going on in Perth (like the all too usual 25kts at Rottnest, 12kts Perth beaches...).
Hope this is OK to post, as not really "competition" for Seabreeze which does an awesome job of collecting all the good weather links in one place (maybe could add this one?) and with the forums is now an all-purpose community site as well.