The whale washed ashore at Khardanda near Uran last evening, the official said, adding that some visitors to the sea shore first spotted it.
"It is likely that this is a blue whale," N Vasudevan, additional principal chief conservator of forest, said."We will bury the carcass at the site itself," Vasudevan said.
This is the eighth recorded case of a whale carcass washing ashore in Maharashtra in the last three years, the official said.
A 40-feet-long whale had washed ashore on the Dapoli coast in 2016.