NCA links:
https://www.nca.gov.au/national-land/lake-burley-griffin/water-quality
https://www.nca.gov.au/events - Enquiries regarding events may be made to NCA Events at 02 6272 2901 or This email address is being protected from spambots. You need JavaScript enabled to view it.
https://www.nca.gov.au/national-land-and-lake/road-and-lake-closures/new-road-and-lake-closures 

Canberra Yacht Club weather:
 
BOM Weather Radar
http://www.bom.gov.au/australia/meteye/ - Meteye gives a local forecast. You may need to enter a post code such as 2600.