The whale, usually found in deep waters, was checked over by experts who sprayed it with water.
It comes after a 100-strong crowd gathered near the lock last night after spotting the whale stuck in the lock.
Jake Manketo, 20, from Richmond, said: “Everyone here is just hoping they get it out.
“We couldn’t believe our eyes when we first saw the poor fella, not every day something like this happens in Richmond.”
It is believed the whale was first spotted at midday a few miles up the river near Barnes Bridge.
Emergency services were attempting to free the baby whale Credit: LNP A rescue team were monitoring its vitals Credit: dkfitldn It is thought to be an infant whale and around 6metres in length Credit: dkfitldn Minke whales are the smallest of the great whales, growing to about 10m.
They can usually be found throughout the northern Atlantic and Pacific Oceans.
Their range extends from the ice edge in the Arctic during the summer to near the equator during winter.
The lock is situated between Teddington and Richmond, comprising of three vertical steel gates suspended from a footbridge.
In 2019, a humpback whale named Hessy died in the Thames after being hit by a ship.
The 33ft marine mammal died after getting stuck near Kent.
Her body was hauled out of the river was hoisted out of the water by a crane.
The baby whale beached itself at Richmond Lock Credit: dkfitldn Rescuers have been spraying the mammal with water while waiting for the arrival of experts Credit: @JakeManketo Crowds gathered to watch the rescue Credit: dkfitldn
Desperate battle to save baby whale stranded in the River Thames after it became stuck at Richmond Lock