The whales appeared in St Ives Bay for around two hours on Saturday, before they dived into deeper water and disappeared from view.
The whales were spotted initially at around 9.30am, by St Ives coastguard station and other wildlife enthusiasts.
Mr Vivian Stratton of the St Ives National Coastwatch Institution was extremely excited to have spotted the creatures, and initially thought they were minke whales, but realised they were humpbacks due to their size.
It was the first time he has spotted the species and sixty years, and he doesn't believe he will see them again in his lifetime.
Reports say that the animals were quite close to the land and the bull was around 45 feet in length, accompanied by a small whale, either female or a young one.
It is uncertain whether the whales will remain close to Cornwall in the cooler waters, or if they will have returned to where they came from. However, we will be keeping an eye on the waters near our Fowey hotel in the hopes of spotting one of the majestic creatures!