If your system is 64 bit, enable 32 bit architecture (if you haven’t already):

sudo dpkg --add-architecture i386

Add the repository:

sudo add-apt-repository ppa:wine/wine-builds

Update packages:

sudo apt-get update

Then install (example for the development branch):

sudo apt-get install --install-recommends winehq-devel

If you prefer to use the Staging branch, replace winehq-devel with winehq-staging in the line above.