The extra fixture comes after Scotland’s summer schedule was wiped out by Covid issues with Tests against Georgia and Romania cancelled along with an ‘A’ international against England.
Scotland will also face Australia, South Africa and Japan at Murrayfield in November.
Scottish Rugby Union chief executive Mark Dodson said: “Following Scotland’s disrupted summer campaign we are pleased to be able to welcome Tonga to BT Murrayfield as part of our Autumn Nations Series.
“I’d like to thank Tonga Rugby CEO Peter Harding and the Tongan Rugby Union for their proactivity in working with us to secure this fixture to ensure we can give fans, players and coaches another Test match to enjoy in 2021.
“Matches with Tonga are always competitive and physically demanding games and we feel this is the ideal way for our Autumn Nations Series to kick off and we look forward to welcoming Tonga back to Scotland.”
Scotland Autumn Internationals 2021
- Scotland v Tonga - Saturday 30th October 2021
- Scotland v Australia - Sunday 7th November 2021
- Scotland v South Africa - Saturday 13th November 2021
- Scotland v Japan - Saturday 20th November 2021