Emergency services were called to La Vallette after reports of a medical incident on Tuesday afternoon (19 August).
Police, ambulance and fire crews attended at around 3.20 yesterday afternoon.
They closed the road to the Pools from the bottom of the Val des Terres and there was no access for some time.
Guernsey Police later confirmed a 71-year-old man was treated by paramedics at the Gent's pool.
He was taken by ambulance to the Princess Elizabeth Hospital but died shortly after being admitted.
In a short statement online, Bailiwick Law Enforcement said officers are supporting the man’s family and expressed their condolences to them.

Guernsey's Animal Shelter warns of myxomatosis outbreak in wild rabbits
Home of Guernsey Football celebrates its one year anniversary
Renaissance 'masterpieces' on display in Guernsey
Guernsey's airline reacts to reduced demand because of Iran attacks
Survey reveals scale of dissatisfaction with off-island travel
Two youngsters questioned by Guernsey Police after fire at Leale's Yard
Prominent Guernsey consultant cardiologist suspended by the GMC
Guernsey FC features on Premier League social media