Boat owners are urged to move their vessels from the Hawkesbury and Nepean rivers following advice the Warragamba Dam is forecast to start spilling downstream.
Maritime Director Angus Mitchell said owners of boats in either waterway should consider making arrangements to move it further downstream in the likely event of flooding.
"Reports advise extra water flow may cause the Nepean River, which leads into the Hawkesbury River, to rise about five metres in the Penrith area, about eight metres near Richmond and about six metres at Windsor, by around 9pm tomorrow," Mr Mitchell said.
“Boaters are advised to avoid the Hawkebsury River in the next few days, and if you have a boat on a mooring on either the Nepean or Hawkesbury, boaters need to move them further downstream.
“Additionally, Roads and Maritime advises people to avoid recreational boating on the Nepean and Hawkesbury rivers in coming days for safety reasons as flood water can be fast flowing and dangerous due to the submerged and semi-submerged hazards it contains.
“Boaters would be encouraged to use other waters recreationally until flooding conditions subside.”
For more information on boating safety visit rms.nsw.gov.au/maritime
For more information on water levels and flooding visit bom.gov.au/nsw or www.ses.nsw.gov.au/communitysafety/floodsafe/