Question: what is the proper temperature to serve guinness?
Answer: The brewer currently recommends that draught Guinness should be served at 6 °C (42.8 °F), while Extra Cold Guinness should be served at 3.5 °C (38.6 °F). Prior to the 21st century it was popular to serve Guinness at cellar temperature (about 13 °C) and some drinkers preferred it at room temperature (about 20 °C).