"These aren't whales we see around NZ very often and certainly not in shallow coastal waters.
"While this whale has made it off the beach and towards open waters, it is very possible this same whale will wash up sadly somewhere else."
In a update just after 3.30pm, locals said the tide is now moving out and low tide is expected at 7pm.
"The whale was floated but could not be coaxed to move to deeper water."
Later this evening DOC will inspect the whale and together with local iwi decide on the next action to take.
A DoC spokesperson said staff were at the scene.
"We have the situation under control and although we appreciate the public's support – there have been onlookers at the scene – we do not require any assistance," the spokesperson said.
The DoC spokesperson said the whale was "energetic" and had been attempting to free itself, but the water was currently not deep enough for it to swim.
"The tide is coming in fairly quickly - high tide is expected in Coromandel Harbour at 1.17pm. The water level is crucial to the whale getting back out to sea," they said.
"Once that water level rises, we will aim to get the whale refloated and shepherd it back out to sea. We have boats on the way to help with this approach."
According to DoC, this kind of stranding is unusual.
Earlier today people were in the water using buckets to keep the whale wet and they were not sure it was alive.
Stockin earlier posted on Facebook about the stranding.
"We are monitoring this presently," she wrote.
"Looks like a very emaciated critter from these rather distant blurry distant images.
"This doesn't bode well for this individual sadly, even when successfully pushed back out unfortunately."