The former Scotland and British & Irish Lions lock died last month, aged 52, after a long fight against motor neurone disease and having raised millions of pounds through his charitable foundation to support research to find a cure for MND.
The memorial service is due to begin at Melrose Parish Church, next to the Greenyards ground where Weir played for several years, at 1pm on Monday, December 19 and will be screened live around the world on the Scottish Rugby website.
Scottish Rugby chairman John Jeffrey, who is also a trustee of the My Name’5 Doddie Foundation, said: “Scottish Rugby is honoured to live stream the memorial service.
“Doddie’s impact was way beyond the rugby community in Scotland and the rest of the British Isles.
“The outpouring of affection for Doddie has been global and I know it will mean a lot to his family and friends that the service is being broadcast on our website.”