The Frenchman is expected to arrive in north London after a £10 million fee was agreed with the Magpies and will be unveiled tomorrow. He will be the second arrival of the summer for the Gunners, who have already confirmed the capture of Alexis Sanchez from Barcelona.
Debuchy is likely to go straight into the Arsenal first team and replace Bacary Sagna, who left to join Manchester City earlier this summer. The deal was delayed while Newcastle completed their swoop for Daryl Janmaat, but now that is done Debuchy is free to head to Arsenal.
The 28-year-old arrived at Newcastle in the summer of 2012 after an impressive string of performances at Euro 2012. He's established himself as regular on Tyneside, and now Wenger has swooped for his countryman.
Arsenal are now back in pre-season training following the World Cup, and boss Arsene Wenger is expected to make further additions to his squad. Interestingly the Gunners have been linked with a swoop for Javi Manquillo from Ateltico Madrid, who also plays at right-back.
That could spell the end of Carl Jenkinson's Arsenal career, and in fact he's been linked with a move to Newcastle.
Aside from Manquilo, Arsenal are said to be in the hunt for Sami Khedira, although there are conflicting reports about where he will end up. It's been suggested that the north London club have agreed a fee for the German, although that appears to be premature.
If a deal can't be struck for Khedira, then Bayer Leverkusen's Lars Bender is being touted as an alternative.