Organisation for the Rescue and Research of Cetaceans Australia (ORRCA) members are keeping their eye out for the whale that washed ashore at Hat Head yesterday.
The 12-metre-long whale washed ashore around midday during large and hazardous surf conditions.
Around 2pm, the whale was washed off the headland by a large wave.
ORRCA vice president Jools Farrell said the last sighting of the whale was yesterday afternoon.
"It was seen about 800 metres offshore and swimming in a northerly direction, although it was moving slowly," she said.
"We do hold concerns for the whale and are asking people to keep an eye out for it."
The whale is approximately 12 metres in length and is estimated to weigh around 25-30 tonne.
Due to poor surf conditions, NSW National Parks and Wildlife Service (NPWS) aren't able to launch boats to search for the whale today.
"At the moment it's a waiting game until a member of the public spots the whale," Ms Farrell said.
"If it does live strand again it will be all hands on deck."
ORRCA encourage anyone who sights the whale to contact their rescue hotline on 02 9415 3333.
"We're also reminding people that if it does live strand again, please don't approach the whale and instead call us immediately," Ms Farrell said.
NPWS and DPIE-Crown Lands, with assistance from Kempsey Shire Council and DPI Fisheries continue to monitor the situation.