The National Capital
Authority has issued warnings for blue-green algae in LBG:

• Extreme Alert for East Basin – water closed for primary contact – Rowing
  OK
• High Alert for Lotus Bay, Yarralumla Beach, Black Mountain Beach, and
  Weston Park East and West beaches – water closed for primary contact – rowing
  OK.
• Medium Alert for the Ferry Terminal area in West Basin – take care
  here.

Also note that there are high levels up the Molonglo River and it is closed
above the Silvia Curley Bridge.