Just seven of the pod of about 50 sperm whales are showing signs of life after the grounding at Perkins Island in the state's northwest.

Strong winds and high tides in the area, which is only accessible by boat, are hampering efforts to reach the whales and attempt a rescue.

Tasmanian Parks and Wildlife Services spokeswoman Liz Wren told Australian Associated Press that a helicopter had flown over the island today to assess the situation.

“It's going to be difficult to get to them because they are big animals - up to 18 metres for males - that makes it very difficult, and they are actually located on an island off the coast,” Ms Wren said.

Conservation experts are discussing how to help the mammals.