The ventilation shaft, leading to a maze of old mining tunnels, is around six-and-a-half feet wide and 25 to 30 feet deep.
Perranporth Golf Club has warned locals and dog walkers to beware after the team were notified about the gaping hole.
Other deep shafts have also appeared behind the Perranporth Surf Life Saving Club, among the Ramoth Way dunes, and a footpath not directly on the green.
Golf club general manager Nathan Gilpin said: “From what mining specialists have been able to decipher – the one on the golf course’s land is a ventilation shaft.
“It doesn’t show up on any mining surveys and it’s not big enough for people to have climbed up and down it.
An area of the course has been fenced off (Image: Perranporth Golf Club / SWNS)
“Several other shafts have also opened up on council-owned land nearby – they have all popped up after the storm and the rains we’ve had.
“We are looking at our options and speaking with some local experts about what we might need to do.
“Obviously with it not being directly a shaft and not being on the actual golf course or residential land there are a few different options.
“Luckily it’s not somewhere where you’re going build a house on top!”
Nathan revealed the shaft had not opened up on a designated footpath – but it is in an area where people sometimes walk their dogs, despite not being allowed to.
The shaft has been cordoned off with fencing until the necessary works are able to be carried out.
Drone footage shows a large shaft open up on a golf course (Image: Perranporth Golf Club / SWNS)
Nathan added: “It’s in an area where someone was walking their dog where they shouldn’t have been.
“We have three public footpaths across the course and these are the only routes people should be walking across the dunes.
“Fortunately people are still able to play golf on the course.
“If someone hits the ball there – at the site of the shaft – they should leave the golf course immediately!”