A father and son from Risdon Vale have been rescued while fishing in Pipe Clay Lagoon in southern Tasmania overnight.

About 11pm Thursday 27 March, the 43-year-old man and his 14-year-old son were flounder fishing in Pipe Clay Lagoon.

They called emergency services for assistance after becoming disoriented and entering deep water several hundred metres from land.

Senior Constable Callum Herbert from police search and rescue said the pair were located by uniform officers and at about 12.45am after support from the Westpac Rescue Helicopter.

“They were pulled from the water by members from Marine and Rescue Services in a specialised shallow draught vessel.

“They were then taken to the Royal Hobart Hospital, where they were treated for hypothermia.

“The rescue of these two individuals is a timely reminder for any members of the public who undertake activities on the water.

“If the response had been delayed, the outcome in this case could have been disastrous.

“We urge you to be prepared, even in waters that seem calm or you are familiar with, always plan ahead by checking the weather forecast, ensuring you have appropriate safety equipment, including a working charged mobile phone.”