The search for a sailor missing off the NSW mid-north coast is expected to resume after wild weather forced rescue crews to pull out overnight.
The yachtsman was thrown from his vessel on Wednesday afternoon after being struck by a huge wave near Broughton Island.
Rescue helicopters deployed to help find the man in his 60s were forced to turn around on Wednesday night due to poor weather and heavy seas.
Emergency crews are expected to decide on resuming the search for the missing yachtsman on Thursday morning.
Rescue choppers are also poised to launch reconnaissance missions over campers stranded on the NSW south coast and residents isolated northwest of Sydney.
A group of 16 adults and two children spent another night stuck at the Bendethera Valley campground west of Moruya on Wednesday amid rising floodwaters.
National Parks rangers are with the group who have adequate food and water for at least two more days, SES spokesman Dave Webber told AAP.
A helicopter will also be flown over Colo, about 80km northwest of Sydney, to check on the welfare of 300 people who remain isolated by floodwaters.
Unrelenting rains which have battered NSW for the past few days are expected to drastically decrease on Thursday, with no more than 10mm forecast across the state.
Floodwaters that have wreaked havoc on residents and holidaymakers along the NSW coast are tipped to start subsiding on Thursday afternoon, Bureau of Meteorology senior forecaster Hugh Bruist told AAP.